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)

• 
  Kanō Jigorō

  linkKōdōkan Jūdō 3

  Confirmed

  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.

  sports_kabaddiKodokan badge (1886)

  expand_morefact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  1 source

  fact_check

  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.

  assessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  "Yokoyama Sakujirō was one of the earliest disciples of Kanō Jigorō."

  — Yokoyama Sakujiro - Wikipedia (English). Wikipedia (English)linkinfo
• In
  Inoue Keitaro

  linkTenjin Shin'yō-ryū 2

  Probable

  Historical records indicate Yokoyama trained in Tenjin Shin'yō-ryū jujutsu before joining Kodokan; specific teacher and dojo mentioned in reliable sources.

  sports_kabaddiYushima Tenjin dojo badge

  expand_morefact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  1 source

  fact_check

  Historical records indicate Yokoyama trained in Tenjin Shin'yō-ryū jujutsu before joining Kodokan; specific teacher and dojo mentioned in reliable sources.

  assessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  "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)

• linkKōdōkan Jūdō

  military_tech8 dan 3

  Confirmed

  Posthumously awarded 8th dan rank; well-documented in Japanese Wikipedia and historical records as one of the highest ranks awarded to early Kodokan practitioners.

  Dan-Kyu System

  expand_morefact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  1 source

  fact_check

  Posthumously awarded 8th dan rank; well-documented in Japanese Wikipedia and historical records as one of the highest ranks awarded to early Kodokan practitioners.

  assessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  "段位は八段（没後追贈）"

  — 横山作次郎 - Wikipedia (Japanese). Wikipedia (Japanese) linkinfo

Students (7)

• 
  Takahashi Kazuyoshi

  linkKōdōkan Jūdō 3

  Confirmed

  Well-documented student of Yokoyama Sakujiro at the Kodokan, mentioned in Japanese Wikipedia biography as his direct disciple

  sports_kabaddiKodokan badge (1904)

  expand_morefact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  1 source

  fact_check

  Well-documented student of Yokoyama Sakujiro at the Kodokan, mentioned in Japanese Wikipedia biography as his direct disciple

  assessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  "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。"

  — 高橋数良 - Wikipedialink
• Sa
  Satake Soshihiro

  linkKōdōkan Jūdō 1

  Uncertain

  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

  sports_kabaddiKodokan badge (1892)

  expand_morefact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  2 sources

  fact_check

  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

  assessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  "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

  "1892年（明治25年）5月に講道館に入門"

  — 佐竹信四郎 - Wikipedialinkhistory
• 
  Omori Kojiro

  expand_morefact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  1 source

  fact_check

  Japanese Wikipedia mentions involvement with Yokoyama Sakujiro at Higher Normal School, but relationship not clearly defined as teacher-student

  assessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  "高師で柔道教授をつとめた横山作次郎とも関わった。"

  — ジオ大森 - Wikipedia (Japanese)linkhistory
• 
  Mifune Kyūzō

  linkKōdōkan Jūdō 3

  Confirmed

  Primary student of Yokoyama Sakujiro at the Kodokan, one of the 'Four Guardians of the Kodokan'

  sports_kabaddiKodokan badge (1903)

  expand_morefact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  1 source

  fact_check

  Primary student of Yokoyama Sakujiro at the Kodokan, one of the 'Four Guardians of the Kodokan'

  assessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  "講道館では横山作次郎に師事。"

  — Japanese Wikipedia article on Mifune Kyūzō link
• Ma
  Maeda Mitsuyo

  linkKōdōkan Jūdō 1

  Uncertain

  Well-documented student of Yokoyama Sakujiro at the Kodokan, mentioned in Japanese Wikipedia and other sources

  sports_kabaddiKodokan badge (1897)

  expand_morefact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  2 sources

  fact_check

  Well-documented student of Yokoyama Sakujiro at the Kodokan, mentioned in Japanese Wikipedia and other sources

  assessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  "また、三船久蔵や前田光世の師匠としても知られる"

  — 横山作次郎 (ウィキペディア)link

  "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
• Is
  Isogai Hajime

  linkKōdōkan Jūdō 1

  Uncertain

  Student of Yokoyama Sakujiro at Kodokan from 1891, as documented in Wikipedia biography, but no direct source checked

  sports_kabaddiKodokan badge (1891)

  expand_morefact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  1 source

  fact_check

  Student of Yokoyama Sakujiro at Kodokan from 1891, as documented in Wikipedia biography, but no direct source checked

  assessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  "In 1891, he moved to Tokyo and joined the Kodokan where he studied judo under Yokoyama Sakujiro."

  — Hajime Isogai - Wikipedialink
• Ii
  Iizuka Kunisaburō

  linkKōdōkan Jūdō 2

  Probable

  Documented as a student at the Kodokan from 1891, with specific enrollment date recorded in historical records

  sports_kabaddiKodokan badge (1891)

  expand_morefact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  1 source

  fact_check

  Documented as a student at the Kodokan from 1891, with specific enrollment date recorded in historical records

  assessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  "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

Sources