Osaka Obachan Rock/Osaka Romanesque
Introduction  is the fourth single released by the Japanese boyband Kanjani Eight. The double-A side single features two songs that are on two separate albums. Osaka Obachan Rock is featured on their second album, KJ2 Zukkoke Dai Dassō while Osaka Romanesque originally appeared on KJ1 F.T.O. The difference is that the single version has a 24-second lead.The limited edition of the single came with a mini poster while the regular edition featured a seven-page booklet.
Track listing ===Regular Edition===# " Osaka Obachan Rock "# " Osaka Romanesque "# " Kitto, Itsuka... "# " Osaka Obachan Rock  "# " Osaka Romanesque  "===Limited Edition===# " Osaka Obachan Rock "# " Osaka Romanesque "# " Osaka Obachan Rock  "# " Osaka Romanesque  "
Charts WeekOricon WeeklyPeak PositionSales TotalJune 11, 2006June Week 32170,257June 18, 2006June Week 41513,022June 25, 2006July Week 1295,284