NK Cell-related Information in Japan

Summary

New City Osaki Clinic in Shinagawa, Tokyo, offers NK cell therapy and immune function assessment as separate services. The clinic states that NK cell therapy is self-pay (not covered by public insurance), that eligibility is decided individually by a doctor based on examination, history, test results and current treatment, and that effects are not guaranteed.

Key terms and basic concepts

NK (natural killer) cells are a type of lymphocyte involved in innate immunity.

NK cell therapy: described as a form of immune cell therapy in which cells are collected from the patient’s own blood, cultured and processed, then administered back.

Immune function assessment: tests checking current immune status with indicators such as NK cell count and NK activity. The clinic notes that immune status cannot be judged from symptoms alone. Assessment and therapy are separate services.

Method as described in the source (institution’s public materials)

Institution’s description

• Cells collected from the patient’s blood are cultured and processed in the clinic’s in-house cell processing center (CPC, facility no. FC3140025).
• Cell separation, culture, quality checks and preparation are managed under the filed manufacturing, quality and hygiene standards.
• Administration is carried out based on a doctor’s judgement.
• The clinic states that in-house processing itself does not guarantee treatment effect.
• Practice since 2004; appointment only (weekdays 9:00–17:00).

What to confirm with the medical team

• First distinguish whether you want immune function assessment or NK cell therapy
• Whether it can be combined with current standard treatment, and how to share information with your doctor
• Schedule for blood collection, culture and administration, and your stay in Japan
• Number of administrations, total cost and additional cost items
• Conditions under which treatment is not possible, and safety information

Limitations, risks and precautions

• The clinic states that effects vary between individuals and are not guaranteed.
• Eligibility is decided individually by a doctor based on examination, history and test results.
• The clinic’s safety/side-effect and fee pages were outside the scope of this check; please confirm directly.
• Genetic age testing and cell storage, also offered by the clinic, are separate from treatment.

Regulatory, approval and cost information

Item	Details
Type of care	Institution’s description NK cell therapy is self-pay (not covered by public insurance).
Cell processing facility	Institution’s description The clinic displays its specified cell processing facility number FC3140025.
Regenerative medicine procedures	Not confirmed In Japan, care involving processed cells may be subject to procedures under regenerative medicine law. The clinic’s plan registration number was not confirmed in this check.
Cost	Not confirmed The clinic’s fee page was outside the scope of this check.
Advanced Medical Care status	Not confirmed No information confirmed that it falls under Advanced Medical Care.
Evidence of effect	Limited evidence / research stage Evidence beyond the clinic’s description was not reviewed in this check.

Questions to ask the medical team

1. For my condition, which is meaningful: immune function assessment or NK cell therapy?
2. What precautions apply when combined with my current treatment?
3. Under what conditions is treatment not possible?
4. What is the administration schedule and how long would I stay in Japan?
5. Can you tell me the total cost and any additional cost items?

Source links and check date

• Source · ニューシティ大崎クリニック (NK細胞療法・免疫機能評価)
  https://www.nco-clinic.jp/
  Checked on: 2026-10-12

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FTH is not a medical institution; it is a company that provides guidance on overseas medical information, translation, and on-site interpretation support. The content of this site is for informational purposes only and does not constitute a diagnosis or treatment recommendation for any individual, nor a guarantee of treatment results. Please discuss the suitability, risks and decision to undergo any treatment with your attending medical team.

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