Dendritic cell vaccine therapy, combined with immune checkpoint inhibitors and local tumor-directed treatment — SynerTri Immunotherapy®.
For patients with advanced cancer seeking a second opinion or a personalized immunotherapy plan. We review your records free of charge and tell you in writing within 1–2 business days whether you can proceed with treatment in Japan — in English, Chinese, Korean, Vietnamese or Arabic.
What began with dendritic cell vaccine technology has grown into a broader precision immunotherapy platform, shaped around the unique biology of each patient's cancer. Each element is chosen with the aim of supporting an immune response against your cancer; whether and how much it helps differs from patient to patient.
A clinical experience of more than 6,500 treated cases in dendritic cell vaccine therapy across the group.
Built on technology developed at the Institute of Medical Science, The University of Tokyo (IMSUT), and advanced through the WT1 platform pioneered at Osaka University and Hokkaido University.
Among the early medical institutions to bring WT1 dendritic cell vaccine therapy into clinical practice.
Our clinical platform is rooted in advanced dendritic cell culture technology developed at the Institute of Medical Science, The University of Tokyo. By integrating the WT1 platform pioneered at Osaka University and Hokkaido University, we helped bring WT1 dendritic cell vaccine therapy into early clinical use.
Precision Clinic Group carries forward decades of clinical and scientific development in cancer immunotherapy. With more than 6,500 treated cases, our platform has been shaped by long-term clinical practice and by care that keeps the patient at the center. The group was established in 2005 and was formerly known as Seren Clinic.
Our platform has moved beyond shared antigens alone. WT1 remains an important component, but our strategy now also draws on tumor-associated antigens (TAAs), neoantigens and antigens derived from the patient's own tumor tissue, chosen according to the biology of each cancer.
Using each patient's genomic information, we identify candidate neoantigen targets and, where appropriate, design a personalized neoantigen-based dendritic cell vaccine. This is what allows us to move toward a truly individualized form of precision immunotherapy.
SynerTri is not a single drug or procedure. It is our name for an individualized treatment approach that may combine dendritic cell vaccines, immune checkpoint inhibitors and treatment directed at the tumor. The combination depends on your diagnosis, previous treatment and overall health. The aim is to support an immune response against the cancer; a biological rationale or a case report does not establish that this combination improves outcomes for every cancer type.
| Component | Role | Mechanism |
|---|---|---|
| 01 Dendritic cell vaccine therapyThe Accelerator | Trains the immune system to recognize the cancer | Supports immune recognition of selected tumor antigens: tumor-associated antigens such as WT1, tumor-specific neoantigens, and antigens derived from your own tumor tissue. |
| 02 Immune checkpoint inhibitorsThe Brake Release | Releases the suppression that holds immunity back | Targets immune suppression pathways such as PD-1, PD-L1 and CTLA-4 that tumors may use to evade immune responses. |
| 03 Local tumor-directed therapyThe Switch | Sends the signal that starts the response | Uses radiation therapy, particle therapy, BNCT or cryotherapy to help stimulate the biological signals associated with anti-tumor immune activation. |
We believe cancer treatment should be guided by the molecular and immunological characteristics of each patient's tumor. By integrating genomic analysis with immunotherapy and local treatment strategies, we aim to develop more individualized approaches to cancer care.
Our process is designed for precision at every step.
Tailoring the treatment strategy to your individual tumor profile.
Collecting immune cells from your blood for vaccine manufacturing.
Preparing your personalized dendritic cell vaccine in our cell processing facility.
Typically once every 1–3 weeks. Initial course: approximately 7 sessions over 4 months.
For neoantigen-based vaccines, genomic analysis and vaccine preparation generally require approximately 2–3 months before administration.
Treatment for patients from overseas follows the same course as for our Japanese patients. What differs is the planning around travel — and that is where our International Medical Department comes in.
No travel needed. Send your medical history, blood tests, imaging and any genomic reports. We reply in writing within 1–2 business days (Japan time), in English, Chinese, Korean or Vietnamese, and tell you whether you can proceed with treatment in Japan.
A fee-based consultation with a physician, online or in person. You receive an individualized plan and a written cost estimate before you decide to travel.
Examinations and apheresis — the collection of immune cells from your blood, which takes about 3–4 hours. Most patients need only a few days for this visit.
Your dendritic cell vaccine is prepared in our cell processing facility. You may return home or stay in Japan during this period.
The first course is about 7 doses over roughly 4 months, usually one dose every 1–3 weeks. Each injection takes about 10 minutes; a clinic visit is about one hour. Doses are given at our clinic, so we plan the schedule with you — a longer stay in Japan, or several shorter trips grouped around the doses.
When radiation or other local therapy is part of your plan, it is carried out at partner facilities and scheduled around your visits.
At the end of the first course we evaluate the response and discuss next steps. After you return home, we stay in contact and coordinate with your treating physician.
Precision Clinic Group has taken part in the clinical evolution of WT1 dendritic cell vaccine therapy. Today that experience continues through SynerTri Immunotherapy, an integrated precision platform that incorporates neoantigen-guided strategies and personalized, immune-based approaches.
A recognized clinical foundation in dendritic cell vaccine therapy. Built on long-standing experience in precision immunotherapy and individualized cancer care.
Dedicated international support. Our International Medical Department supports you at every step:
Patient-centered communication. Clear explanations and recommendations tailored to your condition and your goals. Facing cancer in an unfamiliar healthcare system is hard enough; we work to remove the barriers of language, procedure and culture so that you can focus on your treatment.
Thank you for taking the time to read about us. If you are here, you or someone you love is probably facing advanced cancer, and perhaps considering treatment far from home. I understand how much courage that takes.
For more than twenty years, my work has centered on one question: how to help a patient's own immune system recognize and attack their cancer. That work began with dendritic cell vaccine therapy — technology my company developed and provided to medical institutions across Japan — and continues today at Precision Clinic Group, where we have cared for more than 6,500 cases across our three clinics.
What those years have taught me is that advanced cancer is not one disease, and it deserves more than one answer. We begin with the biology of your tumor, and we design the combination that fits it. We have published this clinical experience in peer-reviewed journals and presented it at the American Association for Cancer Research.
I cannot promise you an outcome — no physician honestly can. What I can promise is this: your records will be read carefully by me and my colleagues, free of charge, before anything else; you will receive a clear plan and a written estimate before you travel; and if you come to Japan, you will be welcomed and accompanied at every step. Please feel free to write to us in your own language, with any question at all.
Yuichiro Yazaki, MD
Director, Precision Clinic Tokyo · Representative, Precision Clinic Group
Care for patients from abroad is led personally by Dr. Yuichiro Yazaki, Director of Precision Clinic Tokyo and founder of the company that brought dendritic cell vaccine therapy into clinical practice in Japan and took it public in 2009. He is supported by the group’s team of 13 physicians in Tokyo, Nagoya and Kobe — medical oncology, surgery, hematology and radiation oncology — so that your plan is reviewed across specialties.

Dr. Yazaki trained as a gastrointestinal surgeon at Tokai University Hospital from 1996. In 2000 he moved from the operating room to genomics at HuBit Genomics, Inc., and in 2003 joined the Division of Cell Processing at The Institute of Medical Science, The University of Tokyo (IMSUT) as a researcher — the institute whose dendritic cell culture technology he would later bring to patients.
In June 2004 he founded Tella, Inc. in Tokyo to develop dendritic cell vaccine therapy and bring it into clinical practice, and led the company as President & CEO, taking it public on the JASDAQ NEO market of the Osaka Securities Exchange in October 2009 — five years after its founding. Tella began providing its technology and know-how to medical institutions in 2005; in 2007 it supported the founding of Seren Clinic Tokyo — the predecessor of Precision Clinic Group — as its first core partner clinic, and secured an exclusive license to use the WT1 cancer-antigen peptide in dendritic cell vaccines. By March 2018 its partner institutions — university hospitals, national hospitals and cancer clinics across Japan — had performed about 11,670 cases of dendritic cell vaccine therapy with Tella’s technology (Tella, Inc. annual securities report, 2018). Through its subsidiary Tella Pharma, Inc., he also supported an investigator-initiated clinical trial of a WT1 dendritic cell vaccine for pancreatic cancer at Wakayama Medical University, in which the first patient was treated in 2017.
Today he leads Precision Clinic Group’s three clinics in Tokyo, Nagoya and Kobe, where more than 6,500 cases of dendritic cell vaccine therapy have been treated, and he designs each patient’s SynerTri Immunotherapy® plan himself. His clinical work has been presented at the AACR Annual Meeting 2024 and published in Cureus (2024) and Tan to Sui (2023), and in 2026 he was featured in Next Era Leaders, paid Custom Content from The Wall Street Journal’s advertising department.
Selected publications: Cureus, 2024 — combination cancer immunotherapy for inoperable stage IV hypopharyngeal carcinoma (case report, Precision Clinic Group) · Publications of the group and its predecessors (Tella / Seren Clinic)
Primary sources related to our treatment approach: our own publications, and peer-reviewed research by other institutions on related antigens, cell-manufacturing methods and immune mechanisms. Listed as citations with links to the original articles.
Papers and presentations authored or co-authored by physicians of our group, including its predecessor clinics (Seren Clinic). Only items verified against PubMed, the publisher or the original document are listed.
The full archive is on the Japanese page 「学術実績」. Abstracts on this page are not reproduced; please refer to the original articles.
Treatment outcomes vary between individuals, and the same results cannot be expected for every patient. Our treatments are not covered by public health insurance in Japan, and some are not established as standard therapy in large-scale clinical trials. Each treatment plan is designed individually, weighing the risks and benefits, with the patient's informed consent. Medical supervision: Yuichiro Yazaki, MD, Director of Precision Clinic Tokyo.
Initial inquiries are free: we review the information you send and tell you whether you can proceed with treatment at our clinics in Japan.
Consultations with a physician, including second opinions, are fee-based and available online or in person.
We reply by email within 1–2 business days (Japan time).
Consultations are by appointment, arranged by email. Closed days differ by clinic and on national holidays.