Regarding Chin Genpin, Bujutsu researcher, author and teacher; Jun Osano (see web page -https://japanbujut.exblog.jp/23706338/) shows a partial picture (see below) of the 神富柔え組大 'Shinto Yawara e Kumi dai' - Gods (Kami) strike big grappling. Also known as the 秘伝組合時代 'Hiden Kumiai Jidai' - Secret transmission war time joining together in grappling document and describes it as "a tradition of Ryōi Shintō 良移心頭 (Shintō 神当) ryū no densho 流の伝書 (transmission document)"

He quotes from the document as follows

"神当柔元祖大民国陳元贇　慶長年中来朝"
- Before the founder Fukuno, the Shintō Yawara originator was a Chinese citizen called Chin Gempin, who arrived in Japan in the middle of the Keichō era (1596 -1615).

"福野七郎右衛門重直"
- Fukuno Shichirouemon Shigenao "

He then suggests "That against the assumption of the influence that Chin Gempin had on Japanese Martial Arts (Nihon Bujutsu Gijutsu 日本武術の技術).

Firstly, there are no customs in China of removing the shoes in a tatami matted room, being in the seated position, and there is also no custom of carry the sword in the belt.

If it had an influence, it would have been more through Chinese thought."

As I have mentioned in previous posts, although some nascent Jujutsu styles existed, Fukuno development marks a transition from Sengoku Jidai (warring states) Kumiuchi (grappling) to Edo period Jūjutsu .

His association with Chin Gempin appears to have marked the introduction of 'Hoshu no jutsu' (捕手の術 - hand taking) and also the three varieties of body strikes consisting of one variety to the face, one variety to the body and one variety to the testicles. These elements would mark the change from battlefield grappling to a peacetime art of Jūjutsu."