Between 1626 – 1627, Ryōi Shintō-ryū (良移心当流) founder, Fukuno Shichirouemon Masakatsu (福野七郎右衛門正勝) studied ‘Torite no jutsu’ (捕手の術 – hand taking) & ‘Kenpō’ (拳法 – fist striking method) from Southern Shaolin (南少林)  monk Chin Genpin (陳元贇) in the Kokushōji (国昌寺) Temple in Azabu (麻布), Edo (now Tokyo).

The (late) founder of American Kenpo Karate, Ed Parker mentions Chin Genpin in his book ‘Kenpo Karate: Law of the Fist and the Empty Hand’ (1960) as follows:

“Other records date even further back to the time of the Ming Dynasty (1368-1644). During this period a Chinese priest named Chin Gen Pin, or Chuen Yuan Pin, (1644-48, or 1627) was believed to be the first to introduce the art of Kenpo to Japan. Since its introduction, it has been a popular belief that Chinese Kenpo gave rise to Japanese Jujitsu.

However, contrary to this belief, Chinese Kenpo and Japanese Jujitsu is quite different, although some knowledge of Kenpo did give stimulus to the progress of Jujitsu. The art of Kenpo brought by Chen Gen Pin consisted mainly of kicking and striking."

I would suggest that Ed Parker's contention (above) that "Chinese Kenpo and Jujitsu is quite different" is overly simplistic.

Kenpō Sappō (拳法殺法 - fist art, killing art), or sometimes just Sappō (拳法), together with Kappō (活法 - living art) remains an intrinsic part of Ryōi Shintō-ryū Jūjutsu (良移心当流柔術) teachings and also within those subsequent lineages that are derived from Ryōi Shintō-ryū.

Even Ed Parker's teacher's teacher, James Mitose refered to his own family art as 'Kenpo Jiu-Jitsu'.