Kaoru is very strong and also known as strongest karate-ka/striker in Japan. He joined the Kaburagi-ryu tournament. During tournament he defeated Aleksey Komchatov, Ryuu Oosugi and Kohinata Minoru. After defeating Minoru he won and became the lightweight champion again.Sometimes he fights in a restaurant under nickname "Dos Kaoru Jr". To encrease winning chance against Gianni Skandalaki Kaoru became Minoru's trainer. Minoru's lost , Izumi Koushou announced a big bout between Samart Sirinto (holder of 7 muay thai titles) and Koudan Kaikan's Hamada Kaoru.