Some of the events that Rika has appeared in are as follows.

1998 03.01	Sotsugyou III Hinamatsuri Concert
1998 03.03	Buzz Vibits broadcast at Taito Station
1998 03.21	Tokyo Game Show Spring 1998
1998 03.22	Tokyo Game Show Spring 1998
1998 04.18	Waseda Pure Pure Festival [second session]
1998 04.22	Shibuya de Chu recording
2001 09.16	Senoir Seniorita vol 1 event in Aoni Museum
2002 05.03	[17:00] Senior Senorita vol 2 in Aoni Museum
2002 07.20	[??:??] Tokyo Character Show 2002 Summer [Kodansha booth]
2002 08.21	[12:30] Tokyo Mew Mew event in Harajuku Ruido