Baki Gaiden: Retsu Kaiou wa Isekai Tensei shitemo Ikkou ni Kamawan!

Baki Side Story: Retsu Kaioh Doesn't Mind Being Reincarnated in Another World!

JPバキ外伝烈海王は異世界転生しても一向にかまわんッッ

AKAバキ外伝烈海王は異世界転生しても一向にかまわんッッ

Synopsis

Chinese martial-arts master Retsu Kaio dies after his brutal duel with Miyamoto Musashi—only to open his eyes in another world. Rather than question the impossible, Retsu embraces the new battlefield before him with the same absolute confidence he carried in life.

Swords, magic, monsters, and fighters unlike anything he has faced now stand in his way. Determined to prove that Chinese martial arts can triumph even in this strange realm, Retsu throws himself into battle against every overwhelming challenge the new world sends his way.