Born in the Aizu domain (Fukushima Prefecture),[2] Sōkaku grew up in a time of war (Boshin) and civil strife and was able to witness both first hand while still a young boy.
The second son of Takeda Sōkichi, a samurai of the Takeda clan who worked his farm and taught at a local school and Tomi Kurokochi, a daughter of Dengoro Kurokochi,[3] a Yari and Kenjutsu master. It is believed that Sōkaku received his first martial arts training from his father who had a dojo on their property.[4] Sōkichi was apparently expert in the use of both sword and spear, and had once been a sumo wrestler of ozeki rank. It is believed that Sōkaku was exposed to the teachings of Hōzōin-ryū Takada-ha and Ono-ha Ittō-ryū, schools of spear and swordsmanship respectively.[5]
Sōkaku then left to go on a period of austere training where he travelled, fought and trained at the schools of many teachers, a not uncommon practise of the time. Reputedly, Sōkaku spent some time as a live-in student of Kenkichi Sakakibara, headmaster of the Jikishinkage-ryū and considered to be one of the most famous and skilled swordsmen of the era.[6] [7] Unfortunately there exist no known historical documents to confirm this relationship and so it is a matter of debate. What is known, however, is that Sōkaku engaged in many matches and duels with both shinai and live blades and was considered a swordsman of great skill in a period of time when such things were beginning to be forgotten.[8]
With the outlawing of the samurai class and the prohibition against carrying swords (Haitōrei Edict) apparentally Sokaku decided to emphasize the empty handed, jujutsu oriented, techniques of his ancestor's art.[9] These apparently were 'oshiki-uchi', or secret teachings of the Aizu clan, up to that point. These, along with other skills he had acquired, were combined to create an art which he christened first 'Daitō-ryū jūjutsu' and later 'Daitō-ryū Aiki-jūjutsu'.[10]
In about 1875, rumor reached Sōkaku that Saigō Takamori had launched his rebellion in Satsuma against the forces of the new Meiji government. He decided immediately that he would go to lend his support. He made it as far as Kyushu but was unable to reach his destination, so he returned to Osaka where he spent the next ten years as a guest in the Kyōshin Meichi-ryū dojo of swordsman Momonoi Shunzo.
Sōkaku lived a somewhat itinerant life, travelling the length and breadth of the country giving seminars in martial arts to military officers, police officers and martial arts enthusiasts, often of high social standing. He left extensive records of those he taught in the 'eimeiroku' and the 'shareikoku' which were attendance and fee ledgers of those who attended and paid for lessons from him.