Short answers, pulled from the story.
Shigeru Matsuzaki is best known in the West for his contributions to the Katamari Damacy soundtracks, which brought his voice to international players of that game. He is also recognized for performing the theme songs of Nerima Daikon Brothers and for playing the title character in the 1982 film adaptation of Space Adventure Cobra.
Matsuzaki's song Kimiga ireba sorede ii became widely known in Thailand after it was used in a Glico almond commercial in 1987. Many local Thai singers covered the song. The same track is not well-known in Japan.
Matsuzaki performed the theme song of the Saitama Seibu Lions of the NPB. The song began to be used when the team moved to Tokorozawa in 1979. In an interview with Weekly Baseball, he described himself as a genuine fan who loved watching games at the Seibu Dome.
Yes, Shigeru Matsuzaki is left-handed. When he plays bass or guitar, his string instruments are tuned with the lower E string at the bottom, as is typical for left-handed players.
Matsuzaki has collaborated with Momoiro Clover Z, a popular Japanese music group.
Matsuzaki's screen credits include the 1982 film Space Adventure Cobra, Cromartie High School in 2005, Nerima Daikon Brothers in 2006, and Dead Sushi in 2012, among others spanning from 1982 to at least 2012.