Gosoku-ryu Shinken learning ancient Kobudo katas while developing his own for his school. The Kobudo kata created by him include: Takemasa Okuyama and Temoanarupe Inuhaere are ranked as 8th dan. Several people were awarded the rank of 7th dan and title of Shihan in Gosoku-ryu: Gosoku-ryu The International Karate Association (IKA) was formed in Tokyo, Japan in 1953 for the purpose of teaching and promoting the Gosoku style of karate. Gosoku-ryū, "the style of force with speed", incorporates the methods of Goju-ryū and Shotokan karate with aikido, jujitsu, and judo. It is applied so as to encompass any attacker from all
Ryu Si-won held his 100th solo concert in Japan as part of his 16 concert tour in eight cities, including Yokohama, Nigata, Osaka, Sendai, Nagoya, and Fukuoka; with the final concert on 21 December at Saitama Super Arena. On 21 December 2011, Ryu was signed on by Japanese travel agency H.I.S, for one-year to promotion Korean tourism in Japan. Where he was featured in two 15-second commercials in the themes of "Let’s go to Korea" and "You are the character of your drama" for Japanese television in January 2012. In May 2012, Ryu starred in Channel A's drama "Goodbye Dear Wife" along