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

1995 06.11	Sotsugyou Cross World All Stars On Stage
1995 08.03	Anime Seiyuu Daikoushin
1995 08.12	[11:00/13:00] Anime Seiyuu Daikoushin
1996 03.23	Ojousama Sousamou in Tokyo
1996 03.30	Ojousama Sousamou in Osaka
1996 05.19	EMU Live in Akasaka Blitz
1996 06.23	NEC PC-FX Anime Festival
1996 08.03	Kaitou Saint Tail Seiyuu Collection
1996 08.24	Tokyo Game Show '96
1997 04.05	Tokyo Game Show
1998 10.10	Tokyo Game Show Autumn 1998
1998 10.11	Tokyo Game Show Autumn 1998
1998 12.06	First Kiss Monogatari event in Animate Abeno
1999 04.18	Soreru announcement
2000 01.30	Digi Chara Festival III
2000 02.19	First Kiss Monogatari Valentine event
2000 05.28	Sabishinbo Club feat PD
2000 08.10-2000.08.13	Ogata Megumi no Tsuki no Yoru ni Ai ma Show!
2002 07.21	[14:30] Tokyo Character Show 2002 Summer [Broccoli Stage]
2006 10.28	[14:00] OVA "Summer Season 1" event Ishimaru Soft One
2009 10.22	[08:30] Windows 7 event at Sofmap
2010 10.18	[13:00/19:00] "Tenshi to Akumato" at Shibuya DUO -Music Exchange