Description
Yokoyama Sakujirō was one of the earliest disciples of Kanō Jigorō and one of
the Kodokan Shitennō (Four Guardians of the Kodokan). He was known as
"Demon Yokoyama" for his violent fighting style and harsh training
methods.
Teachers (2)
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Kanō Jigorō
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Well-documented historical relationship as one of the Four Guardians of Kodokan;
multiple reliable sources confirm Yokoyama was an early disciple of Kano Jigoro
who joined Kodokan in April 1886.
"Yokoyama Sakujirō was one of the earliest disciples of Kanō Jigorō."
— Yokoyama Sakujiro - Wikipedia (English). Wikipedia
(English)linkinfo
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In
Inoue Keitaro
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Historical records indicate Yokoyama trained in Tenjin Shin'yō-ryū jujutsu
before joining Kodokan; specific teacher and dojo mentioned in reliable sources.
"He trained in Tenjin Shin'yō-ryū jujutsu under Keitaro Inoue in the
Yushima Tenjin dojo."
— Yokoyama Sakujiro - Wikipedia (English). Wikipedia
(English)linkinfo
Ranks (1)
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Dan-Kyu System
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Posthumously awarded 8th dan rank; well-documented in Japanese Wikipedia and
historical records as one of the highest ranks awarded to early Kodokan
practitioners.
"段位は八段（没後追贈）"
— 横山作次郎 - Wikipedia (Japanese). Wikipedia (Japanese)
linkinfo
Students (7)
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Takahashi Kazuyoshi
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Well-documented student of Yokoyama Sakujiro at the Kodokan, mentioned in
Japanese Wikipedia biography as his direct disciple
"講道館四天王の1人である横山作次郎の直弟子であり、切れ味鋭い足技を駆使した返し技（裏技）の達人であった。"
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Sa
Satake Soshihiro
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Student of Yokoyama Sakujiro at Kodokan from 1892, documented in Japanese
Wikipedia with specific enrollment date and Simon BJJ blog with quotation about
training together with Mitsuyo Maeda, though more direct evidence of the
teacher-student relationship is needed
"At some point later, probably in the late 1890’s, he joined the Kodokan
and would become peers of Mitsuyo Maeda. The two judoka trained together under
Sakujiro Yokoyama, who was known as one of the Four Guardians of the
Kodokan"
— The Sumo wrestler who taught BJJ, Soshiro Satake
link
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Omori Kojiro
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Japanese Wikipedia mentions involvement with Yokoyama Sakujiro at Higher Normal
School, but relationship not clearly defined as teacher-student
"高師で柔道教授をつとめた横山作次郎とも関わった。"
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Mifune Kyūzō
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Primary student of Yokoyama Sakujiro at the Kodokan, one of the 'Four
Guardians of the Kodokan'
"講道館では横山作次郎に師事。"
— Japanese Wikipedia article on Mifune Kyūzō
link
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Ma
Maeda Mitsuyo
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Well-documented student of Yokoyama Sakujiro at the Kodokan, mentioned in
Japanese Wikipedia and other sources
"また、三船久蔵や前田光世の師匠としても知られる"
"At some point later, probably in the late 1890’s, he joined the Kodokan
and would become peers of Mitsuyo Maeda. The two judoka trained together under
Sakujiro Yokoyama, who was known as one of the Four Guardians of the
Kodokan"
— The Sumo wrestle who taught BJJ, Soshiro Satake
link
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Is
Isogai Hajime
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Student of Yokoyama Sakujiro at Kodokan from 1891, as documented in Wikipedia
biography, but no direct source checked
"In 1891, he moved to Tokyo and joined the Kodokan where he studied judo
under Yokoyama Sakujiro."
— Hajime Isogai - Wikipedialink
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Ii
Iizuka Kunisaburō
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Documented as a student at the Kodokan from 1891, with specific enrollment date
recorded in historical records
"one day he saw a man carrying a judo uniform and followed him to the
Kodokan. There he applied for entry, was found acceptable, and signed its
enrollment book on November 23, 1891 (...) Sakujiro Yokoyama was head
instructor."
— Judo: Kunisaburo Iizuka (Journal of Combative
Sport, July 2002)link
Linked data
https://martial.is/entity/01KJJAWN29MA64W22606R3WD7H