Kaiou Retsu is a fictional character in the Baki the Grappler anime and manga series. He was a very accomplished fighter of Chinese Kenpo and a friend of Katsumi Orochi. At first, he was an antagonist in the series, but later became one of the main characters. His real name is Eishuu Retsu. In his training days in Heilongjiang, Bailin Temple he was called Shaoron Retsu.