Nominally an eight-strong boy band from the Japanese region of Kansai, Kanjani Eight ("8" is spelled horizontally, like an infinity sign) is actually an umbrella showbiz brand that Johnny & Associates, a gigantic male idol manufacturing agency, has specialized in. The group's music is the expected pop fare, with some rap and a good deal of enka (Japanese traditional music style) added, but the members also band together into subunits ranging from the rock Subaru Band to the Kanjani Sentai Eight Rangers (a comedy skit act), run variety and radio shows, and star in TV series and...