After releasing
State of the Art in May 2006, Shinhwa quickly began preparing their first Japanese album and single. As preparation work for their Japanese album release, Shinhwa held a press conference in Japan on April 14, 2006, in addition to performing at Mnet's anniversary celebration in Japan on April 15, 2006. The press conference came as a result of Shinhwa's effort to break into the Japanese market. Shinhwa released first
Japanese language single "Sun in Our Hearts" on June 14, 2006, which debuted at number nine on the
Oricon Singles Chart. Their first official album,
Inspiration #1, was released in Japan on August 16, 2006. ==Track listing==