Sakura Wars @ez

On February 24, 2002 RED Company launched a paid service for EZweb called "Sakura Wars @ez" (サクラ大戦 @ez) that distributed mini games on mobile phones based on the Sakura Wars franchise. The monthly fee for the service is 315 yen (w/ Tax) and and additional 105 yen (w/ Tax) to use "Mobile sound storage hall" and "Super sound storage hall". The service was later terminated on November 30, 2014 at 4:00 pm.

Resources
k-tai.watch.impress.co.jp

red-entertainment.co.jp

itmedia.co.jp

game.watch.impress.co.jp

dengekionline