PS4 The Idolmaster: Platinum Stars ‘Miki Hoshii’ character trailer The eighth in Bandai Namco series' of idol introduction trailers. The latest The Idolmaster: Platinum Stars character trailer introduces Miki Hoshii. Previous trailers introduced Ami Futami, Mami Futami, Iori Minase, Haruka Amami, Yayoi Takatsuki, Chihaya Kisaragi and Takane Shijou.The PlayStation 4 idol training game is due out on July 28 in Japan. If you missed it, catch the latest information blasts here, here, and here. Watch the trailer below.