It’s obvious that there are way too many Nintendo DS quiz games out in Japan. Publishers keep targeting smaller and smaller niches just to get a piece of the brain training pie. Taito’s idea is to wrangle in people interested in the Japan rail system with Tetsudou Seminar JR Hen (Railroad Seminar JR Book). Next year you can master train routes and browse through the trains. It’s the perfect way to kill time while… umm… sitting on the Yamanote loop? After all, that is the place where most the DS is most handy.