Kenkojuku student of Gichin Funakoshi. He was a member of Funakoshi's karate association the Dai Nihon Karate-do Shotokai. In 1942, Okano was given permission to start a karate research club named Kenkokai Karate-bu in his hometown of Hachiōji, Tokyo. The club was started with the help of Suzuki Shinjo, Kaneko Isamu and Takagi Yoshitomo. He renamed the dojo Kenkojuku Budokan in 1948. Okano's karate was influenced by both Gichin and Gigo Funakoshi, and eventually this branch of Shotokan became known as Kenkojuku Shotokan. He retained the Shotokai lineage as well as the name Shotokan. Okano was on the panel of Masters
Ryu Se-ra Ryu released her first solo EP album "SeRen:Ade". On September, 2015, Ryu held her first solo solo concert in Hongdae, for which 600 people attended. In March 2018, Ryu founded a new agency OCTO and announced that she will continue solo activities with her real name, Ryu Se-ra. An agency official has stated that the name OCTO carries a meaning of a new beginning. On March 2, Ryu released a single album "Stay Real", managed and published by her new agency. Later that month, Ryu held a second solo concert titled "Spring Rain" at Olympic Hall Muse Live stage, followed