Carbon Ion Therapy Cost in Japan — Published Fees by Hospital (2026)

The cost of carbon ion therapy in Japan depends above all on which billing category your treatment falls under. According to amounts published by Japanese institutions, the irradiation technical fee is JPY 3.14–3.5 million under Advanced Medical Care (senshin iryo) and JPY 3.14 million + consumption tax to JPY 3.85 million (tax included) under self-pay care, while the Osaka Heavy Ion Therapy Center separately lists JPY 4.8 million + consumption tax for patients from overseas. All figures below are official amounts posted on hospital websites; eligibility is decided by physicians after reviewing your records. To check eligibility and an estimated total for your case, please contact us for a cost consultation.

Why does carbon ion therapy cost differ by hospital and patient?

Carbon ion therapy (heavy ion therapy, 重粒子線治療) accelerates carbon ions to near light speed and delivers them to the tumor. Its principles are explained in What Is Carbon Ion Therapy?; this article focuses on cost.

In Japan the fee is billed through four routes. First, public health insurance: people enrolled in Japanese insurance who are treated for a covered cancer (e.g., prostate cancer, head and neck tumors, bone and soft tissue tumors) pay 10–30% of the total, with a monthly cap under the high-cost medical expense system. Second, Advanced Medical Care: indications not yet covered are provided under this government-approved category; the irradiation technical fee is paid in full by the patient while routine care such as consultations, tests and hospital stay is billed to insurance. Third, self-pay care: insurance cannot be mixed in, so tests, drugs and hospital stay are all self-paid as well. Fourth, some institutions set a separate fee for patients from overseas.

So the answer to "how much does carbon ion therapy cost?" depends on which hospital, which category and which cancer. The technical fee is usually set per course, whether the course is 4 or 16 sessions; the Osaka center states its fee applies regardless of the number of irradiations.

Published fees at Japanese carbon ion therapy centers

The table summarizes each institution's fee page as checked in October 2026. Reference dates are those shown by the institution. Fees can change, so always obtain a current quote before treatment.

Even within Advanced Medical Care, fees range from JPY 3.14 to 3.5 million. These are the irradiation technical fee only; initial consultation, CT/MRI/PET for planning, immobilization devices and hospital stay are extra. Kanagawa i-ROCK accepts bank transfer only and does not refund fees if treatment is stopped after it begins, so check payment terms in advance.

Fees, payment methods and international intake differ by hospital. See Japanese Institutions first, and contact us if you need your records reviewed.

Which carbon ion therapy fee applies to international patients?

Patients not enrolled in Japan's public insurance cannot use insured care or the insured portion of Advanced Medical Care, so treatment is generally fully self-paid. The Osaka center states JPY 4.8 million + tax for this case, excluding flights, lodging and medical tourism agency fees. QST Hospital lists a self-pay fee of JPY 3.85 million (tax incl.) and has a separate page for overseas patients, so the applicable amount should be confirmed through the hospital's quote at intake.

The application route also matters: Gunma University's FAQ states overseas patients must apply through an intermediary. Most institutions require Japanese translations of records, advance review of imaging and medical interpreting on the day, so these preparation costs add to the total. They are not hospital-published fees, so compare written quotes.

Insurance-covered vs. Advanced Medical Care cancers in Japan

Insurance does not apply to overseas patients, but the category shows how established the treatment is in Japan. Below is the classification posted on Kanagawa i-ROCK's fee page (limited to cases where curative surgery is difficult).

For reference, QST Hospital lists the insured total (on which patients pay 10–30%) as JPY 1.6 million for prostate and JPY 2.375 million for head and neck, bone and soft tissue, etc. Eligibility criteria by cancer are covered in prostate cancer, pancreatic cancer and liver cancer. Stage, metastasis and prior radiotherapy can make a patient ineligible; widespread metastases or prior high-dose radiation to the same site often exclude treatment.

What goes into the total cost, and a pre-consultation checklist

According to Gunma University's FAQ, treatment takes 4–16 sessions, roughly one week to one month, and some conditions are treated as inpatients. Plan for:

• Irradiation technical fee: institution-published amount per course (table above)
• Consultation and tests: first visit, planning CT/MRI, PET if needed, immobilization devices
• Inpatient or outpatient costs: some centers admit patients for head and neck, pancreatic or uterine treatment combined with chemotherapy
• Stay: lodging and transport for about one week to one month plus test days
• Translation and interpreting: records, imaging reports and on-site interpreting
• Follow-up: plan for post-treatment scans after returning home

Preparing these speeds up the eligibility review and quote:

• Recent medical certificate/summary (diagnosis, stage, treatment history)
• CT, MRI, PET images on CD with reports (ideally within 1–2 months)
• Pathology (biopsy) report and operative notes if any
• Prior radiotherapy (site, dose) and current medications
• Questions: Am I eligible? How many sessions? Is admission needed? What costs beyond the technical fee? When is payment due, and what is the refund policy?

Frequently asked questions

How much does carbon ion therapy cost in Japan?

Per published fees, the technical fee is JPY 3.14–3.5 million under Advanced Medical Care and JPY 3.14 million + tax to JPY 3.85 million (tax incl.) under self-pay care. The Osaka center lists JPY 4.8 million + tax for overseas patients. Tests, stay, lodging and interpreting are extra.

Does a larger number of sessions cost more?

Published technical fees are usually per course; the Osaka center states the same fee regardless of the number of irradiations. Longer stays do increase incidental costs.

Can foreigners use Japanese health insurance or Advanced Medical Care riders?

Patients not enrolled in Japan's public insurance are generally fully self-paying. Gunma University's FAQ also notes that insured conditions are not treated under Advanced Medical Care, so such riders cannot be used for them.

Is there a refund if treatment is stopped?

It depends on the institution. Kanagawa i-ROCK states fees are not refunded once treatment has started. Confirm payment and refund terms in writing.

Is carbon ion therapy painful?

Gunma University's FAQ explains that patients feel no pain or heat when radiation, including carbon ions, hits the body. Side effects such as dermatitis may still occur depending on the site.

Sources

• QST Hospital "費用について" (updated 2026-04-01)
• Osaka Heavy Ion Therapy Center "治療費について"
• Gunma University Heavy Ion Medical Center FAQ
• Kanagawa Cancer Center i-ROCK "治療費について" (as of Jan 2025)

General information based on public sources; not a substitute for diagnosis or treatment. Eligibility is decided by the treating physicians. Written by the FTH editorial team.