GameCubeXL reports that the event is believed to be held at a retailer by the name Tsutaya's Shibuya store.

Games such as Biohazard Remake and Kyojin no Doshin have been confirmed as a feature game at the event. Information on other titles or their demo was not released.

Also, which may occur, various Gamecube and Gameboy Advance giveaway contest may be held.

We will keep you informed!

Source: GameCubeXL