I have read that Edward William Barton-Wright trained in Shinden Fudō-ryū Jūjutsu (神傳不動流柔術) and Kōdōkan Jūdō (講道館 柔道).

However, I recently obtained a Japanese scroll called the:

Kyushin ichi-ryū Jūjutsu Honshin no maki (扱心一流柔術本心之巻) see below.

I got this because Kyushin-ryū is derived from Kitō-ryū Jūjutsu (起倒流), which in turn is derived from Ryōi Shintō-ryū Jūjutsu (良移心当流 柔術 ) and this particular scroll includes the Kitōryū katsu-hō (活法 revival methods).

This sparked my interest in Kyushin-ryū and I was interested to see many pictures from Edward William Barton-Wright's book on the Kyushin-ryū wikipedia page and also mention that he trained and attended demonstrations with Eguchi Yasushi (江口彌三), who is included in those pictures.

There is also mention of a that one of the demonstrations was organised by Uchida Ryōgorō (内田良五郎), who was Chief of the Prefectural Police (also a student of Kyushin Ryu) and the father of Uchida Ryōhei (内田 良平).

Uchida Ryōhei was the founder of the Kokuryūkai (黒竜会 - Black Dragon Society), but was also a member of the Jigō Tenshin-ryū Jūjutsu (自剛天真流 柔術) and instrumental in the promotion of the Jigō Tenshin-ryū through the building of the Meidokan Dōjō (明道館 道場) in Meiji 22 (1889).

The Jigō Tenshin-ryū Jūjutsu was a non-lineal branch of the Ryōi Shintō-ryū and preserved many of it's techniques.

I would refer anyone interested to my pervious posts, about Uchida Ryōhei, Jigō Tenshin-ryū and the techniques in Col. Risher W. Thornberry’s book ’A General Course in Jiu-Jitsu’ (1933), which were drawn from his experience of training Jigō Tenshin-ryū Jūjutsu in Japan.