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

1990 03.03-1990.03.04	7th Nihon Anime Festival
1990 08.30	Fuuma no Kojirou event in Nagoya
1990 08.31	Fuuma no Kojirou event in Osaka
1991 12.21	Gekkou no Pierce/Yuukan Club movie event in Nagoya
1992 03.28	Wataru Memorial Live
1992 09.19	Wataru 3 Aki Matsuri
1992 12.19	Wataru 3 Christmas Party
1993 08.20	Dracon '93
1994 08.21	Pioneer OAV Festival 94
1998 01.10	Jisedai World
1998 11.01	Hidaka Noriko Yamadera Kouichi talk show
1999 07.25	Radio Big Bang public recording
1999 08.14	Natsu da! Matsuri da! Yama-chan da!
2001 07.28	[13:00] Movie Cowboy Bebop Tengoku no Tobira Special Event in Osaka
2001 07.28	[17:00] Movie Cowboy Bebop Tengoku no Tobira Special Event in Nagoya
2001 09.01	Cowboy Bebop Tengoku no Tobira movie greeting at Shibuya Tokyuu 3
2002 10.20	"Yama-chan no Katatte Kudakeru" signing in Kinokuniya Shinjuku
2004 03.06	[10:00] Innocense movie talk show at Hibiya Eiga
2004 03.28	[14:00] Tokyo International Anime Fair (main stage)
2004 06.20	[11:00] 20th Jisedai World Hobby Fair Pokemon Special
2004 10.23	[15:00] Tokyo Kokusai Entertainment Market 2004 main stage
2004 11.23	[14:45] Shinjuku JAM SESSION Shrek 2 DVD talk
2006 03.26	[14:30] Anime Quiz event at Tokyo Kokusai Anime Fair
2007 08.07	[0:00/13:00/16:00] Pikachuu The Live
2008 03.30	[13:00] Tokyo Anime Fair 2008 Main Stage
2008 09.14	[18:30] Seiyuu Kouen in ShitaCome
2011 03.13	[13:00/18:00] Hypnagogia -Sound Theatre- Nihonbashi Mitsui Hall
2012 10.13	[22:30] Cowboy Bebop All Night Jouei Event Roppongi
2013 03.30	[10:25] Dragonball Z movie event Marunouchi Toei