“Mojacat,” Kan Sano’s first solo album in four years, gave the musician the opportunity to work with childhood favorites such as Chara and Ua. | Yoshiharu Ota Kan Sano has been a go-to producer, live backing musician and collaborator in the Japanese music ecosystem for well over a decade. Yet, according to him, it’s only on his latest album, “Mojacat,” that he really started trusting others creatively. “I’ve always been something of a perfectionist, and I’ve wanted to build all the sounds myself,” Sano, 42, says over a video call from his home studio, which is crammed with records. “When you make things by yourself, there’s a limit to what one person can imagine. If you bring in other people’s ideas, you can do things you never could have imagined on your own.…