I recently recieved the Ueno Takashi 20th Anniversary book from Buyubooks.com (plug)...something struck me as pretty interesting:
Thoughts? My mouth hung open throughout reading it...There are many common techniques between Daito ryu Aikijujutsu and Asayama Ichiden ryu Taijutsu, both of which are said to be the official ryu of Aizu-han. Takeda Sokaku, who is believed to be the founder of Daito ryu Aikijujutsu, was a very close relative of the Kurokochi family, and was in charge of teaching Aizu-han bujutsu and Shin Muso Hayashizaki ryu Iaijutsu (Muraku ryu). It seems he became the adopted son of Kurokochi-den Goro, who was renowed as a master of Aizu budo. Takeda was well educated by Kurokochi-den Goro and learned the martial arts of the Kurokochi family. The Tanaka family, who were the chief retainers of Aizu-han, and the Kurokochi family (who served the lord with Hayashizaki ryu Iai) were families that passed won the lineage of Hayashizaki ryu Iaijutsu (founded by Hayashizaki Jinsuke). Therefore, it is not surprising that Asayama Ichiden ryu was handed down to Takeda Sokaku. I assume that in the Kurokochi family Takeda Sokaku also learned Asayama Ichiden ryu Taijutsu, Bojutsu, and Tanbojutsu (short stick technique). These techniques are stil in the Daito ryu Aikijujutsu. This is the reason that the same kata are contained in both ryu (lineages). However, I assume that the reason why Aizu-han's chief retainers, the Tanaka family and the Kurokochi family, did not openly claim Asayama Ichiden ryu Heiho as their lineage is that Tsunoda-kaden was widely practiced among gamblers in Joshu.