Takeda Sōkaku (武田 惣角; October 10, 1859 – April 25, 1943) was known as the founder of a school of jujutsu known as…Takeda Sōkaku (武田 惣角; October 10, 1859 – April 25, 1943) was known as the founder of a school of jujutsu known as Daitō-ryū Aiki-jūjutsu. His nickname was The Little Tengu of Aizu and he was known as Minamoto no Masayoshi (源正義).
Hisashi Terao (寺尾 寿, Terao Hisashi) (1855-1923) was a Japanese astronomer and mathematician. He graduated from the…Hisashi Terao (寺尾 寿, Terao Hisashi) (1855-1923) was a Japanese astronomer and mathematician. He graduated from the Tokyo imperial University as well as from the University of Paris, and he was one of the founding members and the first principal of The Tokyo Academy of Physics (now Tokyo University of Science). Notable students that studied under him include Shin Hirayama, Hisashi Kimura, and Kiyotsugu Hirayama. He is also called one of the first astronomers of the Meiji era.
Takeda Ayasaburō (武田 斐三郎; November 4, 1827 - January 28, 1880), was a Japanese Rangaku scholar, and the architect of…Takeda Ayasaburō (武田 斐三郎; November 4, 1827 - January 28, 1880), was a Japanese Rangaku scholar, and the architect of the fortress of Goryōkaku in Hokkaidō. Takeda was born in the Ōzu Domain (modern-day Ōzu, Ehime) in 1827. He studied medicine, Western sciences (rangaku), navigation, military architecture. He was a student of Ogata Kōan and Sakuma Shōzan. In 1854 he was ordered to the island of Hokkaidō to reinforce the military infrastructure. He built the fortresses of Goryōkaku and Benten Daiba between 1854 and 1866, using Dutch books on military architecture, and also established a school. He also practiced sailing with the Hakodate Maru, one of Japan's first Western-style sailing ship, together with his students. He sailed to Russia with the ship, and engaged in some exchanges.