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

1995.12.22	Ezaki Productions Christmas event
1999.09.18	Tokyo Game Show 99 Autumn
2001.05.05	[13:45] Kodomo no Hi Anime Yuuenchi at NHK Shibuya
2001.07.04-2001.07.08	Hadaka no Oujisama in Space 107
2002.05.19	[15:00] Shinsengumi Internet Radio fan event
2002.08.23	[18:30] Shinsengumi Internet Radio The Matsuri
2004.03.06	[10:00] Innocense movie talk show at Hibiya Eiga
2004.07.31	[13:00] Kyoukara (Ma)ou DVD talk show
2005.01.30	[14:00/17:00] Eternal Valentine in Hotel Mausu
2005.05.17-2005.05.22	Mouse Promotion Dai 3 Kai Honkouen "Sakura no Sono"
2005.12.18	[12:30/15:20] Jump Festa 2006 Banpresto booth
2008.06.03	[19:00] Mouse Promotion Play "Gin to Aka no Kioku"
2008.06.04	[14:00/19:00] Mouse Promotion Play "Gin to Aka no Kioku"
2008.06.05	[19:00] Mouse Promotion Play "Gin to Aka no Kioku"
2008.06.06	[14:00/19:00] Mouse Promotion Play "Gin to Aka no Kioku"
2008.06.07	[13:30/18:00] Mouse Promotion Play "Gin to Aka no Kioku"
2008.06.08	[13:30] Mouse Promotion Play "Gin to Aka no Kioku"
2008.06.22	[14:00] Ohtsuka Akio 1st Photo Collection handshake
2009.06.21	[18:00] Reading For The Ties 2009
2010.03.20	[14:30/18:00] Seiyuu Festa Haru CC Lemon Hall
2010.09.18	[13:00] Tokyo Game Show 2010 Kojima Productions Special Stage
2016.08.15	[15:00] Mausu Shop Open Kinen Talk Show
2018.05.06	[10:30] Machi Asobi to Ayunda Mausu no Rekishi
2018.08.18	[11:30] Mausu Doubutsuen Key Holder Owatashikai
2018.09.23	[] Tokyo Game Show 2018 Death Stranding live show
2019.09.15	[16:00] Tokyo Game Show 2019 Playstation booth Death Stranding