To commemorate the grand opening of Square-Enix Cafe Osaka (taking place October 14th), the cafe will have a KH-themed event celebrating the series' 15th anniversary. Admission will be free for 40 Square-Enix members will be invited (all drawn by lottery), and the event will include members of the Kingdom Hearts development team.
In addition to that, Square-Enix Cafe Osaka, Square-Enix Cafe ARTNIA, and the Tokyo Square-Enix Cafe will all be holding a joint campaign to celebrate the series' 15th anniversary. ARTINIA will hold it from October 14 - December 14, while the Osaka and Tokyo cafes will hold it from October 14 - November 10. Check the goodies included with the campaign below:
Kingdom Hearts 15th Anniversary Celebration @ Grand Opening of Square-Enix Cafe Osaka