Otoko-Zaka Vol. 7

Jingi Kikukawa has never lost a fight in 13 years. That is, until Sho Takeyama, the ringleader in Western Japan, comes to visit Jingi’s hometown, Kujukuri, Chiba, to see the Pacific Ocean before he travels to the U.S. Defeated by Takeyama, Jingi goes to Oniyama to train with Kenka-Oni, a demon who uses dangerous teaching methods. Jingi survives the training and stops Toukichi Kuroda, head of the Toukichi Alliance whose control spans from Tokyo to Chiba, and so Jingi’s army begins their advance!
Notice: This manga is written in Japanese.