At a very early stage of my training with James Shortt Sensei in the late 1970s, I remember him mentioning a rumour that the Takeuchi-ryū (竹内流) Jūjutsu (柔術) School had written a manual for the notorious and feared ‘Kempei-tai’ (憲兵隊 - military police regiment).

Recently at auction, I obtained a copy of a Kempei-tai Hojōjutsu  & Jūjutsu  manual

The title translates as:

'Japanese Military Police (Kempei憲兵) (Hojōjutsu 捕縄術 & Jūjutsu 柔術 replica) Shizuoka Military Police Squad Military Police - Commander Komatsu Mine’ (日本軍憲兵 (捕縄術 柔術 複製品) 静岡憲兵分隊 憲兵司令官 峯 幸松)' manual.

On first glance, I have not seen any mention of the Takeuchi-ryū (竹内流), but it is interesting nonetheless, especially the subjects listings - as can be seem from the translation of the Table of Contents page.