Which martial arts exist in Japan? I research about that question.Link is basically which martial art's most authoritative Commission or Federation or Dojo.I plan to write about different list about kick boxing and Muay Thai lately.
All Japan Judo Federation
Kodokan's Jigoro Kano's statue
It's Judo but focus on grappling.Watch wikipedia for rule.
Wikipedia Kosen Judo
Shichitei Judo (Seven imperial university's Judo)
Yuki Nakai and Shiko Yamashita have this martial arts back ground.
It's only hold at imperial university (Wikipedia (Seven imperial university)).All 7 imperial university in Japan have shichitei judo club.It's focus on grappling like Kosen Judo but difference is no "Mate (Wait)" call so just people can focus on grappling.Shichitei Judo's game hold by each school's team.So there is type of player just beat and next guy to guy,or just aim draw.When Team beat other team's 15 people,game is over.This concept make grow each competitors specialty.One fighter just aim finishes and other just aim defence for draw.
Youtube Shichitei Judo (Japanese)
At Japanese wikipedia Yuki Nakai import "stop don't move" concept to mma from Shichitei Judo.I have no source except wikipedia so I just give reference.Youtube video have "stop don't move" scene.
Japan Karatedo Federation
Kyokushin Kaikan Headquaters
Seido Kaikan Headquarters
Daidojuku (Wajyutsu Keisyukai's roots)
Japan Sambo Federation
Jiu-Jitsu Federation Of Japan (head Rickson Gracie)
Axis Jiujitsu Academy Chiba (One of Rickson Gracie Jiujitsu affiliate Gym)
Brazilian Jiu-Jitsu Federation Of Japan (head Yuki Nakai)
Japan Wrestling Federation
Japan Boxing Commission
Isamu Sugiuchi and Yoshifumi Dogaki have this martial arts back ground.
Nippon Kenpokai official
Wikipedia Nippon Kenpo
Nihon Sumo Kyokai (Pro)
Japan Sumo Federation (Amateur)
All Japan Kendo Federation
Kendo Federation Headquarters
Pancrase's Yuki Kondo and Miki Shida have this martial arts back ground.
Shorinji Kempo Organization
Wikipedia Shorinji Kempo
Japanese Self Defense Army Martial Arts
Combination of Nippon Kenpo and Aikido
Capoeira Angola Center Japao
Japan KURASH Federation
Japan Pencak Silat Association
Taekwondo world org is separated by political reason.
I have no idea how many org exist in Japan.
International Taekwon-do Federation Japan
Japan Taekwondo Association
Masato Fujiwara,Takumi Yano,Takefumi Hanai and Takeharu Murahama have this martial arts back ground.
Nihon Koppo Budo Association Official
My article about Koppo
SKILL MMA's Japanese Martial Arts Gym or Venue photo series