The genyōsha (society of the Dark Ocean) was founded by Hiraoka Kotarō (1851–1906) and Toyama Mitsuru (1855–1944), and other former samurai of the Fukuoka domain as the "Koyōsha", it agitated for a return to the old feudal order with special privileges and government stipends for the samurai class.

[3] After the end of the War and Toyama's death Oba opened the Dojo (1948) to general public and called its teaching "Takeda Ryu".

In 1956, Nakamura Hisashi went to Tokyo to help Oba in the Seibuden dojo in replacement of Moritomo Kazuo.

Nakamura believed that randori (free exercises) and shiai (competition) were able to increase physical and mental strength.

[4] In 1990, Morimoto Kazuo died, leaving Nakamura as the last teacher of Koryu do Takeda Ryu Bujutsu.

Nowadays, Takeda Ryu Nakamura Ha is taught in Japan by Nippon Sobudo Rengokai (NSR).

And Worldwide through the NSR (Nippon Sobudo Rengokai) Europe Africa led by Okuden Shihan Debo Ohgen Minamoto no Harumitsu (Valmy Debot), under the lead of Nakamura.

Seven disciplines are taught inside the Takeda Ryu Nakamura Ha Sobudo.

The school uses competitions (shiai) and randori as a way of teaching, it is the only way to be close to the true fighting situation.