Some of the events that Mariko has appeared in during the year 2004 are as follows.

2004 02.07	[18:00] Drops CDS live in Komaba Eminence
2004 02.15	[16:30] NHK Saitama Housoukyoku Kaikyoku 60 Shuunen Kinen
2004 03.06	[13:00/16:30] My Best Friend 3 talk show at Animate Ikebukuro
2004 03.07	[14:00/17:30] My Best Friend 3 talk show at Animate Nagoya
2004 05.08	Drops 2nd Single event
2004 08.21	[15:00/19:00] Drops Live Tour 2004 at Nanba Hatch
2004 08.22	[15:00/19:00] Drops Live Tour 2004 at Diamond Hall
2004 08.28	[15:00/19:00] Drops Live Tour 2004 at Shibuya O-East