battler or combatant), and "master instructor" (マスターインストラクター masutāinsutorakutā)[3] to his martial arts peers.
ZRC gained prominence in Japan when it was used in High&Low The Red Rain and Re:Born.
[4] While ZRC trains anyone learning the martial art via bare hands, knives, swords, batons, flashlights and handguns, the use of rifles is also included in its curriculum.
[5][6] ZRC was inspired by Inagawa learning Kobudō, Muay Boran, Sambo, Systema, Eskrima, and elements from Jieitaikakutōjutsu.
[7] Inagawa has provided self-defence guidance to the members of the JGSDF Central Readiness Regiment.