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