1. Why Korean residents consider Japan
Mounjaro (tirzepatide) is marketed by Eli Lilly in Korea for type 2 diabetes under KFDA (Ministry of Food and Drug Safety, 식약처) authorization, but the formal obesity indication has been slower to roll out at scale than in the US, UK, Japan, Singapore, and Malaysia. As of late 2026, Korean residents seeking Mounjaro specifically for weight management typically face three realities: limited availability at diabetes-focused clinics (where it is prescribed off-label or under physician discretion), high private-clinic pricing where it is available, and persistent concerns around grey-market imports. Against that backdrop, a growing community of Korean patients — particularly from Seoul, Busan, and other major metros — is flying to Tokyo for a formal prescription from a licensed Japanese physician.
The volume of Korean search traffic to our clinic’s site has grown substantially over the past 12 months, and queries like “도쿄 마운자로 성지” (literally “Tokyo Mounjaro sacred place”) now show high click-through rates — a word-of-mouth phenomenon suggesting that Korean patients are actively referring one another to Tokyo as a Mounjaro destination. The reasons recur in patient conversations.
Pricing differential
In Seoul, Mounjaro at private clinics typically costs KRW 800,000-1,500,000 per month, with higher doses (7.5 mg and above) sometimes exceeding KRW 1,800,000 monthly where available at all. The Japan equivalent at a mid-tier Tokyo private clinic is approximately JPY 19,000 (~KRW 172,000) per month for 2.5 mg, or JPY 92,000 (~KRW 832,000) for a 6-month bundle. For a 6-month course, the gap is dramatic: KRW 832,000 in Japan versus KRW 4,800,000-9,000,000 in Korea for the same starter dose, before travel costs. Even with flight and hotel added, the total trip usually costs less than 2 months at a Seoul private clinic.
Formal obesity indication and dose availability
Japan’s Pharmaceuticals and Medical Devices Agency (PMDA) approved Mounjaro for the obesity indication in December 2024, and the drug is now routinely prescribed at licensed private clinics across all six dose strengths (2.5 / 5 / 7.5 / 10 / 12.5 / 15 mg). For a Korean patient planning a dose escalation protocol over 6-12 months, consistent dose availability matters as much as unit price. Patients escalating in Korea sometimes have to switch clinics mid-protocol due to supply inconsistency; this is largely a non-issue in Japan.
Harvard-trained physician, English or Mandarin direct
Our clinic director, Dr. Masakazu Amano, holds an MPH from Harvard T.H. Chan School of Public Health and is a board-certified internal medicine physician in Japan. He conducts consultations personally in English or Mandarin, without an interpreter chain. For Korean patients comfortable with English (common among those with international education or work experience) direct English consultation is the fastest and most clinically precise option. For Korean-Chinese patients (조선족) or those more comfortable in Mandarin, direct Mandarin is available. For patients who prefer Korean, Google Meet real-time translation works well for the majority of consultations — see the payment & language section below.
Combining with Tokyo shopping or vacation
Tokyo is already one of the top international destinations for Korean travelers. Round-trip flight time ICN-NRT is only 2.5 hours — shorter than many domestic flights within larger countries. A consultation that takes 30-45 minutes by video (or 60 minutes in-person) slots easily into a weekend or short vacation. The clinic is in Shinjuku, Tokyo’s major shopping and entertainment district — roughly equivalent to a combination of Myeongdong, Hongdae, and Gangnam, within a 2 km radius. Many Korean patients explicitly frame the trip as “a weekend shopping trip to Tokyo that pays for itself.”
Privacy and clean medical record
Korean private medical records can flow between clinics under various consent frameworks, and the Korean private medical community is smaller than it looks for patients working in regulated industries (finance, legal, government, aviation, entertainment) or in high-visibility roles. A Japanese private clinic operates on an entirely separate medical records system, with no data connection to Korean MOH, KFDA, or NHIC databases. English medical summary documents are provided on request for continuity of care if you later want to transition to a Korean prescriber.
This guide does not recommend medical travel to Japan to evade local prescribing regulations or professional disclosure obligations. The legitimate reasons for a Japan Mounjaro trip include price differential, formal obesity indication availability, dose consistency, physician language choice (direct English or Mandarin), and the convenience of combining medical and tourism travel. All medication brought home should be for personal use only; resale or commercial import is illegal in Korea under the Pharmaceutical Affairs Act (약사법).
2. Total cost comparison
Below is a 6-month total cost comparison for a Korean resident on 2.5 mg Mounjaro. Higher doses amplify the gap further, since Japan’s price scaling across dose strengths is more compressed than Korea’s.
Korean resident (KRW)
| Scenario (6 months, 2.5 mg) | Medication | Other | Total |
|---|---|---|---|
| Stay in Korea Seoul private clinic, 2.5 mg x 6 months |
KRW 4,800,000-9,000,000 | Consultations KRW 200,000-500,000 | KRW 5,000,000-9,500,000 |
| Fly to Tokyo 2-3 night trip + 6-month bundle |
KRW 832,000 (JPY 92,000) | Flight KRW 300,000-600,000 + hotel KRW 200,000-500,000 + consultation ~KRW 55,000 | KRW 1,400,000-2,000,000 |
| Fly to Tokyo (LCC budget) Jin Air / T’Way + capsule or mid-tier hotel |
KRW 832,000 | Flight KRW 300,000 + hotel KRW 200,000 + consultation ~KRW 55,000 | KRW 1,390,000 |
| Same-day return GMP-HND early + late same-day return |
KRW 832,000 | Flight KRW 350,000 + no hotel + consultation ~KRW 55,000 | KRW 1,240,000 |
Even the budget LCC scenario at approximately KRW 1,390,000 represents a saving of KRW 3,600,000-8,100,000 over 6 months versus Seoul private clinic pricing. At higher doses (7.5 mg, 10 mg) where Korean clinics charge the most, savings per trip typically exceed KRW 10,000,000 for a 6-month course.
Unlike some medical travel scenarios where the trip only breaks even at a 6-month supply level, the Korea-to-Japan Mounjaro trip is economically favorable from the very first month. Even a 1-month supply from Japan (JPY 19,000 / ~KRW 172,000) plus flight (KRW 300,000-600,000) plus hotel (KRW 200,000-500,000) totals ~KRW 700,000-1,300,000 — less than one month at many Seoul private clinics. For most patients, bundling 3-6 months is the obvious choice.
3. Flight routes & logistics
Korea is the closest major country to Japan geographically, which makes Tokyo one of the most practical international medical destinations for Korean residents. Below are the main direct routes from Korea’s primary airports, plus notes on secondary cities.
Seoul Incheon (ICN)
Seoul Gimpo (GMP) — shuttle convenience
Busan (PUS / Gimhae)
Jeju (CJU)
Daegu (TAE)
Our clinic is at Shinjuku 2-6-4, 3F Toyo Building, one minute’s walk from Shinjuku-sanchome station (Marunouchi / Fukutoshin lines). We recommend staying in Shinjuku, Yoyogi, Harajuku, or Shibuya for both proximity to the clinic (if you choose in-person consultation) and central access to Tokyo shopping and tourism. Mid-tier hotels like Sunroute Plaza Shinjuku, Hotel Gracery Shinjuku, Century Southern Tower, or Shibuya Excel Tokyu run JPY 15,000-25,000 per night (approximately KRW 135,000-225,000). Budget capsule hotels and business hotels around Shinjuku start from JPY 7,000-10,000 (KRW 63,000-90,000) per night.
4. 2-3 night typical itinerary
Because flight time is only 2-2.5 hours and there is no time zone shift between Korea and Japan, a 2-night (3-day) trip is sufficient for most patients, and a highly efficient same-day return is also feasible from GMP-HND. Below is the standard 2-3 night sequence most Korean patients follow.
Day 1 (Arrival)
Morning departures from ICN or GMP typically arrive Tokyo HND/NRT by late morning or early afternoon. There is no time zone adjustment, so you arrive effectively 2.5 hours after departure.
HND arrivals: Keikyu line direct to Shinagawa, transfer to Yamanote line for Shinjuku (~30 minutes). NRT arrivals: Narita Express direct to Shinjuku (~90 minutes) or Keisei Skyliner to Nippori then Yamanote line.
If you have booked an online consultation, it can take place from your hotel room in the afternoon. If you prefer in-person, walk 1 minute from Shinjuku-sanchome station to the clinic for a 30-45 minute consultation.
Shinjuku has multiple late-night shopping options for Japanese pharmacy items, cosmetics (Matsumoto Kiyoshi, Don Quijote), and dining in Omoide Yokocho or Golden Gai. Many Korean patients stock up on Japanese-specific items (Shiseido, SK-II, Hakuhodo brushes) they can’t easily find in Seoul.
Day 2 (Medication receipt + Tokyo exploration)
Within 24 hours of consultation, Yamato Transport delivers Mounjaro to your hotel front desk at 2-8°C. If you consulted on Day 1 afternoon, delivery is typically on Day 2 morning or early afternoon. Alternative: visit the clinic in person on Day 2 for direct pickup with insulated bag and ice packs.
Shibuya, Harajuku, Omotesando, Ginza, Asakusa, or Odaiba. The clinic location (Shinjuku-sanchome) is central — Yamanote and Fukutoshin lines connect to all major districts in 10-20 minutes.
Many Korean patients pack a Tokyo tourist program into this day: tea at a Shibuya cafe, dinner in Omotesando, nightlife in Roppongi, or a show in Shinjuku.
Day 3 (Departure)
Place medication in carry-on only with an insulated travel pouch and gel ice packs (hotel will typically freeze gel packs overnight on request). Cargo hold temperatures can drop below freezing. Keep prescription documentation accessible.
Upon arrival at Incheon or Gimpo, proceed through customs with documentation ready. Declare prescription medication through the red lane; this is routine for personal-use quantities with proper paperwork.
Same-day return option (GMP-HND)
For patients who want maximum efficiency, a same-day return is feasible: depart GMP on an early morning flight (06:30-08:00), arrive HND 08:30-10:00, in-person clinic consultation around 11:00-12:00, lunch and medication pickup around 13:00-14:00, return HND to GMP on an afternoon flight (16:00-18:00). This works best for patients already on a stable dose who need primarily a prescription refill, and for patients comfortable with English (as a same-day format reduces time budget for Korean translation support).
5. What to do in Tokyo during the trip
The consultation
The initial consultation is 30-45 minutes and covers medical history, BMI confirmation, prior treatment status (if any), goal setting, Mounjaro pharmacology, side-effect counseling, dose titration schedule, and injection technique. Conducted personally by Dr. Amano in English or Mandarin. For Korean patients, we recommend one of two approaches: (1) direct English consultation if you’re comfortable with medical English (fastest, most precise), or (2) Google Meet with real-time Korean translation enabled on your side (works well for 95%+ of patients, with the physician speaking slowly and confirming key terms).
In-person visit option
eHealth Clinic Shinjuku is located at Shinjuku 2-6-4, Toyo Building 3F, approximately one minute’s walk from Shinjuku-sanchome station exit E1 (Marunouchi line, Fukutoshin line) or six minutes from Shinjuku station east exit. The consultation room is private. In-person visits are useful if you prefer face-to-face discussion, want nursing support for your first injection, or want to combine the visit with Shinjuku-area shopping afterwards.
Medication delivery (two options)
- Hotel delivery via Yamato cold-chain: Most common choice for travelers. Yamato Transport is Japan’s premier logistics operator; the refrigerated service (Yamato Cool TA-Q-BIN) maintains 2-8°C throughout transit. Delivered to your hotel typically within 24 hours of consultation. The hotel stores it in staff refrigeration until you collect receipt.
- Clinic pickup: If you chose in-person consultation, you can collect medication the same day. The clinic provides an insulated bag and gel packs for the trip back to your hotel.
First injection training
Mounjaro Ateos is a pre-filled auto-injector designed for self-administration: remove cap, press against abdomen or thigh, press the release button. Total injection time is approximately five seconds. The clinic provides:
- Written step-by-step instructions in English (and Mandarin on request)
- Short demonstration video (downloadable to your phone)
- Optional 10-minute video check-in before your first injection, for live physician guidance
- In-person nursing demonstration during clinic visits (if you opted for in-person consultation)
Shopping and tourism (Myeongdong equivalents in Tokyo)
For Korean visitors, Tokyo neighborhoods map to familiar Seoul districts in useful ways:
- Shinjuku — Combination of Myeongdong (shopping) and Jongno (entertainment). Dense department stores, Isetan, Lumine, Takashimaya, plus 24-hour entertainment district
- Shibuya & Harajuku — Like Hongdae and Gangnam young fashion districts. Shibuya 109, Omotesando Hills, Takeshita Street
- Ginza — Like Cheongdam. Luxury brands, high-end department stores (Mitsukoshi, Wako), Michelin-star dining
- Asakusa & Ueno — Traditional Japan: Senso-ji temple, Nakamise shopping street, Ueno Park
- Odaiba & Toyosu — Modern waterfront, like Yeouido. teamLab Planets, DiverCity, Odaiba beach
- Day trips — Hakone (hot springs with Mt. Fuji views), Kamakura (seaside temples), Nikko (UNESCO shrines)
Dr. Masakazu Amano, clinic director, holds an MPH from Harvard T.H. Chan School of Public Health, is a board-certified internist (Japanese Society of Internal Medicine), and certified nephrologist (Japanese Society of Nephrology). He personally conducts every initial consultation and all video follow-ups, in English or Mandarin. For Korean patients, we support Google Meet real-time Korean translation, which works well for the majority of consultations. For Korean-Chinese (조선족) patients comfortable with Mandarin, direct Mandarin consultation is available with no translation delay.
6. Bringing medication home
Korea permits personal import of prescription medication for personal use, subject to quantity limits and documentation requirements. For a deeper general treatment covering all countries, see our customs guide for travelers returning from Japan.
Korea Customs Service (관세청 / 식약처) rules
The Korea Customs Service and Ministry of Food and Drug Safety (MFDS / 식약처) permit personal medication import under the following framework:
- Up to 3 months of personal supply: Routinely permitted without special permit, provided you carry a valid prescription and the medication is clearly for personal use.
- Beyond 3 months: May require import authorization from MFDS; discretion applies based on documentation quality. For planning purposes, we recommend most Korean patients plan around a 3-month supply per trip, or carefully document the 6-month bundle with full physician letter and personal use declaration if pursuing a longer bundle.
- Mounjaro status: Tirzepatide is KFDA-authorized in Korea (for diabetes indication initially), so it is not an “unknown drug” concern. Officers generally recognize the brand.
Declaration process at Incheon (ICN) or Gimpo (GMP): proceed through the red lane (declaration lane) rather than the green nothing-to-declare lane. Present your English prescription, the physician’s letter, original packaging, and passport. Processing is typically 5-10 minutes.
Documentation to carry
- English prescription from Dr. Amano (issued by the Japanese clinic) — Korean translation is not required but can speed processing in rare cases
- English doctor’s letter stating the medication is for personal use, with your name, dose, duration, and the clinic’s contact details
- Original Mounjaro packaging with Japanese labeling (do not transfer medication to a different container)
- Passport with Japan entry stamp
- Hotel receipts (helpful to demonstrate the trip was legitimate medical/tourism travel, not commercial import)
Cold-chain management during the flight
- Carry-on only — never check Mounjaro in cargo hold
- Use a medical-grade insulated travel pouch with gel ice packs (6-8 hour rating; a 2.5-hour ICN/GMP to Tokyo flight is well within this envelope)
- Request the hotel freeze your gel packs overnight before departure
- At HND, NRT, ICN, or GMP, inform the airline check-in that you have medically-necessary cold packs; this is permitted under aviation medical exception rules
- Mounjaro tolerates room temperature up to 30°C for up to 21 days per Eli Lilly labeling, so a brief temperature excursion during customs processing is not a problem
Korea prohibits the import of prescription medication for resale, redistribution, or any commercial purpose under the Pharmaceutical Affairs Act (약사법) and related regulations. “Carrying for a friend,” splitting medication into unlabeled containers, or importing clearly excessive quantities can result in prosecution. Carry only your personal supply, keep original packaging intact, and never agree to carry medication on behalf of another individual.
7. Follow-up after returning home
Within the 6-month window: video follow-up
You do not need to return to Japan during your initial 6-month prescription window. All follow-up is conducted via video consultation with Dr. Amano, in English or Mandarin (with Google Meet Korean translation support available for patients who prefer Korean). Standard follow-up schedule:
- Month 1-3 (dose escalation phase): Monthly video check-ins to confirm tolerability and plan dose escalation (2.5 mg → 5 mg → 7.5 mg)
- Month 4-6 (stabilization): Every 2-3 months, or as needed
- Side effects or questions: Email or video available any time
Dose adjustments are made through this video channel. If you need to step down (e.g., due to GI side effects), the physician re-plans with the pens you already have. No new trip required.
After the prescription runs out: three options
- Return trip to Japan for a new supply: If the economics continue to favor Japan (likely at any dose, and especially at 5 mg and above), book a repeat trip. Many Korean patients align repeat trips with another Tokyo weekend or shopping trip. 6-month bundle = typically one trip per year for maintenance.
- Transition to a Korean prescriber: Request an English clinical summary from our clinic before departure (free of charge). This document helps a Korean physician continue the same dose and monitoring plan. Suitable if you’ve stabilized on a dose and prefer local continuity, or if Korean availability improves over time.
- Hybrid approach: Use Japan for the active titration and higher-dose phases (where Japan savings are largest) and consider a Korean prescriber for maintenance at a stable dose (if local pricing becomes competitive at that specific dose).
Before leaving Japan, request an English medical summary from the clinic. This document (free of charge) includes your diagnosis, dose history, treatment plan, and physician contact. Useful for:
• Any Korean physician you may consult for continuity
• Private health insurance claims (some international policies cover overseas prescriptions)
• Emergency medical care if side effects require local evaluation
8. Payment & language
Payment methods
The clinic accepts international credit cards including:
- Visa — all major Korean issuers (KB Kookmin, Shinhan, Hana, Woori, NH Nonghyup, IBK, Lotte Card, Samsung Card, Hyundai Card, BC Card)
- Mastercard — same as above
- JCB — most Korean bank-issued JCB cards
- American Express — all AmEx cards
Payment is processed in Japanese yen. Your card issuer applies their foreign currency conversion rate at settlement, typically within a 1-3% band from mid-market. There are no additional surcharges from the clinic. For reference, 1 KRW is approximately 0.11 JPY in October 2026 (equivalently, 1 JPY is approximately 9 KRW). A 6-month bundle at JPY 92,000 converts to approximately KRW 832,000 at mid-market rates.
Consultation language
Dr. Amano personally conducts consultations in English or Mandarin. For Korean patients, we recommend one of three approaches depending on your comfort level:
- Direct English consultation: Fastest and most clinically precise. Recommended if you’re comfortable discussing medical topics in English (common among Korean patients with international education, overseas work experience, or English-medium professional backgrounds).
- Direct Mandarin consultation: Available for Korean-Chinese patients (조선족) and others comfortable in Mandarin. No translation delay.
- Google Meet real-time Korean translation: For patients who prefer Korean, Google Meet’s real-time captions and translation now work well in Korean. The physician speaks in English at a measured pace, Google Meet translates to Korean captions on your screen in real time, and you can respond in Korean (with English translation shown on the physician’s side). This works for the vast majority of Korean patients. Key clinical terms are confirmed explicitly during the consultation.
Why language directness matters
Weight-management medication involves nuance: side effect timing, dose adjustment rationale, drug interactions, dietary context, and emotional factors around eating behavior. Having a physician who can answer directly (rather than through a two-step translator chain) matters for clinical quality. For Korean patients, the three-option framework above lets you choose the balance between language comfort and consultation precision that works best for your specific situation.
9. FAQ
Do Korean passport holders need a visa for Japan?
No. Korean passport holders enjoy 90 days visa-free entry to Japan for tourism, business, and personal medical travel. A valid passport with at least 6 months remaining validity is sufficient. No pre-arrival visa application is required. Medical travel is considered personal purpose and does not require any special visa category.
Can I combine the Mounjaro trip with a Tokyo vacation or shopping trip?
Yes, and most Korean patients do. The consultation itself is 30-45 minutes by video, and medication delivery to your hotel takes less than 24 hours. The rest of your 2-3 night stay is yours for Shibuya, Harajuku, Shinjuku shopping, Ginza, Asakusa, or Odaiba. The clinic is in Shinjuku, which is Tokyo’s equivalent of Myeongdong for shopping and dining.
Can I have the consultation in Korean directly?
The physician conducts consultations personally in English or Mandarin. For Korean-speaking patients, we recommend Google Meet with real-time Korean translation, which works well for the majority of consultations. If you are comfortable with English for medical discussion, direct English is the fastest and most precise option. For Korean-Chinese (조선족) patients who speak Mandarin, direct Mandarin consultation is available.
I live in Busan or Jeju — what are my route options?
From Busan (PUS), direct flights to Tokyo HND or NRT take approximately 2 hours on Korean Air, Asiana, JAL, ANA, Air Busan, or Jin Air. From Jeju (CJU), seasonal direct flights to NRT run on T’Way and other LCCs, approximately 2.5 hours; off-season you may need to transit via ICN or GMP. From Daegu (TAE), direct flights to NRT are available on T’Way, approximately 2 hours. Round-trip pricing from secondary cities typically runs KRW 300,000-600,000.
If my spouse or family member travels with me, can they also get a prescription?
Yes, but each person needs their own separate consultation and prescription. We cannot issue a prescription for someone who has not personally completed a consultation with our physician. We often book family consultations back-to-back on the same day to minimize scheduling friction. Each patient’s medical history, BMI, and dose plan is assessed individually. Pediatric patients under 18 are not candidates for Mounjaro.
Can I pay with my Korean credit card?
Yes. The clinic accepts Visa, Mastercard, JCB, and American Express cards issued anywhere in the world, including Korean banks (KB Kookmin, Shinhan, Hana, Woori, NH Nonghyup, IBK, Lotte Card, Samsung Card, Hyundai Card, BC Card). Payment is processed in Japanese yen, and your card issuer applies their standard foreign currency rate at settlement. There are no hidden surcharges from the clinic.
What if I experience side effects after returning to Korea?
Contact the clinic directly via email or video consultation. Our Harvard-trained physician provides ongoing follow-up in English or Mandarin (with Google Meet Korean translation available) for all international patients at no additional travel cost. Most side effects (nausea, mild GI symptoms, fatigue) resolve within 1-2 weeks of dose initiation. For acute severe symptoms (severe abdominal pain, allergic reaction, persistent vomiting), seek local emergency care immediately and inform your Korean physician that you are on tirzepatide (티르제파타이드) — show them your English clinic summary for faster assessment.
Is there a 90-day supply limit at Korean customs?
Korea Customs Service (관세청) permits personal import of prescription medication for personal use, generally interpreted as up to a 3-month supply without special permit. Carry a valid English prescription, doctor’s letter stating personal use, keep original packaging intact, and declare proactively through the red lane at Incheon or Gimpo. Beyond 3 months, you may be asked to apply for an import authorization from the Ministry of Food and Drug Safety (식약처). For most patients, aligning your trip to a 3-month supply works smoothly; two trips per year still saves substantially over Korean private clinic pricing.
Do I need to fly back to Japan for follow-up visits?
No. All follow-up consultations are conducted by video with the same Harvard-trained physician who issued your original prescription. Dose adjustments, side-effect management, and treatment evaluation are handled entirely online, in English or Mandarin (with Korean translation support via Google Meet). You only need to return to Japan when your supply runs out and you want a new prescription, or you can transition to a local Korean prescriber at that point.
Can I return to Japan within 6 months for a top-up?
Yes. There is no restriction on repeat visits. Many Korean patients make 2 trips per year, aligning each with a Tokyo vacation or shopping weekend. Each trip can book a new consultation and new prescription. The combination of 2.5-hour flight time, visa-free entry, and consistent dose availability makes repeat Japan trips practical in a way that would not work for most other destinations.
Online video consultation (English or Mandarin, with Korean translation support): Book online consultation (Ambii) →. In-person visit at Shinjuku clinic (1 minute from Shinjuku-sanchome station): Book in-person visit →. Specify your language preference (English, Mandarin, or Korean via translation) in the booking notes.
References
- Korea Customs Service (관세청) — Personal Importation of Medicinal Products Guidance
- Ministry of Food and Drug Safety (식약처 / MFDS) — Personal Medication Import Framework
- Eli Lilly — Mounjaro Japan Obesity Approval (December 2024)
- Immigration Services Agency of Japan — Visa-Free Entry for Korean Passport Holders (90 days)
- SURMOUNT-1 clinical trial — New England Journal of Medicine, July 2022
- Mounjaro (tirzepatide) prescribing information, Eli Lilly & Company
- Japan Society for the Study of Obesity (JASSO) treatment guidelines
- Pharmaceutical Affairs Act (약사법), Republic of Korea