Teachers (1)

• person
  Yamaguchi Gōgen

  sports_martial_artsGoju-ryu Probable

  Probable

  Single source.

  The evidence favours the claim and nothing credible contradicts it, but it falls short of establishing it.

  fact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  1 source expand_more

  fact_check

  Single source.

  “Nei-Chu So, one of Yamaguchi’s early students in the Ritsumeikan University karate club, confirmed that Yamaguchi was the originator of jiyu-kumite”

  — Cramer, Mark I.. (2018). The History of Karate and the Masters Who Made It: Development, Lineages, and Philosophies of Traditional Okinawan and Japanese Karate-doinfo

Students (1)

• 
  Mas Oyama

  sports_martial_artsKarate Probable

  Probable

  Wikipedia confirms Oyama studied Goju-ryu under Nei-chu So for several years.

  The evidence favours the claim and nothing credible contradicts it, but it falls short of establishing it.

  fact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  1 source expand_more

  fact_check

  Wikipedia confirms Oyama studied Goju-ryu under Nei-chu So for several years.

  “Oyama then studied Gōjū-ryū karate for several years with Nei-chu So [...] who was a fellow Korean from Oyama's native province and a senior student of the system's founder, Chojun Miyagi.”

  — Wikipedia contributors. (2026). Mas Oyama - Wikipedia (EN). Wikipedia (English)link history info

Sources