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On the occasion of the 450th anniversary of Taisha-ryū, the current head
of the school has authorised the founding of the

Taisha-ryū Historical Research Group

We Study
the documents and the traditions of Taisha-ryū to

the history of Taisha-ryū and

its legacy for future generations.


Under the supervision of the 15th sōke Uehara Eriko and shihan Yamamoto Takahiro, the Taisha-ryū Rekishi Kenkyū-kai will aim to study and preserve the heritage and history of all lines of Taisha-ryū. This includes, but is not limited to:

  • The study and analysis of the contents of existing Taisha-ryū documents;
  • Research on the history of Taisha-ryū, its dissemination and development;
  • Acquiring historical documents of Taisha-ryū that appear for sale in public;
  • The creation of resources for the research and preservation of historical material for future generations;
  • Preserving the history of Taisha-ryū and providing a solid, scientific reference basis for future students;
  • Making reliable and authentic, thoroughly researched information about Taisha-ryū available to its members and the public at large;

Annual Bulletin of the Taisha-ryū Historical Research Group

As of 2023, the Taisha-ryū Historical Research Group shall publish an Annual Bulletin, detailing curated pieces of the research carried out in the previous year.

For the foreseeable future, the bulletin shall be produced in English and published in physical form. 

All contents of the Bulletin shall be subject to copyright and cannot be redistributed publicly without permission. Commercial use is also prohibited without permission. The copyright holders of cited material (text, images, etc.) remain the same. However, use of the material within the copyright purview of the THRG for educational purposes may be permitted upon request.

Please contact us per e-mail, if  you wish to inquire about back issues of the Annual Bulletin

Current Issue

1 (2023)

The current edition of the Annual Bulletin of the Taisha-ryū Historical Research Group is concerned with a particular line of the school which finds its origins in Sagara Seibei Yorimori – a senior retainer of the Sagara domain – and with tracing other possible connections to the school in the area of Hirosaki, northern Honshu, where Seibei was sent into exile in 1641.

Support Us

Since these activities and especially the rescue of valuable historical documents, their preservation and study require financial backing, we provide interested parties with the opportunity to support THRG’s activities by means of an annual subscription service.

If you make a donation of more than €60 per year you will receive a copy of the current issue of the Annual Bulletin* free of charge.

  • Please note that when you donate, you will have to provide an address in the donation form. It will be stored and used only for shipping your copy of the Annual Bulletin and no personal information shall be given to third parties or used for other purposes.

The subscription can be made at any time during the calendar year and is valid for that year. As a non-profit venture, any and all funds will be used exclusively towards the above-listed objectives.

Please note that all contributions are non-refundable.