Yokoyama Sakujiro

Yokoyama Sakujirō 横山 作次郎
Yokoyama Sakujirō, the Guardian of the Kōdōkan.
Born	1864 Tokyo, Japan
Died	September 23, 1912(1912-09-23) (aged 48)
Native name	横山 作次郎
Nationality	Japan
Style	Tenjin Shinyo ryu, Judo
Teacher(s)	Kanō Jigorō

Yokoyama Sakujirō (横山 作次郎^?, 1864 – September 23, 1912), was one of the earliest disciples of Kanō Jigorō.

Yokoyama was born in Saginomiya, Tokyo, Japan in 1864. He was a student of Tenjin Shin'yō-ryū jujutsu under Inoue Keitaro (井上 敬太郎^?) in the Yushima Tenjin (湯島 天神^?) dojo, but also trained in Kitō-ryū. He joined the police in Yamagata prefecture and became a student of Daitō-ryū Aiki-jūjutsu in the dojo of Takeda Sokaku (武田 惣角^?). Yokoyama was 22 when he entered the Kōdōkan dojo in April, 1886. He is believed to have come originally to the Kodokan as a challenger, pledging himself to Kano's teachings after being bested by Saigō Shirō. Yokoyama further assisted Kano in establishing the Kōdōkan. He was considered the most formidable of all judo experts of his time, which reflected in his nickname of "Demon Yokoyama" (鬼横山, Oni Yokoyama^?).