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