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

1998 05.10	Kirara event in Yomiuri Land
1998 07.26	Kirara Completion event in Suginami Koukaidou
1998 08.01	Kirara Completion event in Osaka
1998 08.02	Kirara Completion event in Nagoya
1998 08.08	Kirara event in Kawagoe
1998 08.09	Kirara event in Hachiouji
1998 08.15	Kirara event in Sendai
1998 08.16	Kirara event in Sapporo
1998 08.22	Kirara event in Shizuoka
1998 08.23	Kirara event in Yokohama
1998 09.15	Kirara event in Yamagiwa Soft
1999 07.20	Anime Scramble event
2000 07.22	Tokyo Character Show
2000 07.23	Kirara event in Kanda Panse Hall
2000 11.12	Kira Melo Bunkasai 2000 Speciore in Amazing Square
2000 12.22	2000 Xmas Party Nyokki no Heya he Youkoso
2000 12.23	Jump Festa 2001
2000 12.24	Jump Festa 2001
2001 01.13	Osaka Character Festival
2001 01.14	Osaka Character Festival
2001 02.11	Valentine Party in Kousei Nenkin Kaikan
2001 02.18	[13:00] Puni Puni Poemi event in Animate Machida
2001 02.18	[15:00] Puni Puni Poemi event in Ishimaru Denki Yokohama
2001 02.18	[16:00] Puni Puni Poemi event in Animate Yokohama
2001 03.17	Sengoku Shougi event in Sofmap Gigastore Ohmiya
2001 07.15	Akumajan Devil Mahjong event in Akihabara Satou Musen PC Island
2001 07.21	Tokyo Character Show [Sister Princess Stage]
2001 07.29	Akumajan Devil Mahjong event in Daiei Shoppers Plaza
2001 08.12	Anime Japan Fes 2001 The Auction
2001 09.04	Seiyuu Collection Returns One Year Anniversary
2001 09.15	The 6th Animation Kobe Song and Talk Anime Paradise
2001 10.12	Tokyo Game Show
2001 10.13	Tokyo Game Show -Sister Princess public recording-
2001 10.13	Tokyo Game Show -Success booth-
2001 10.14	Tokyo Game Show -Success booth-
2001 10.28	Chotto Ugoku Nyokki event in Ishimaru Soft One
2001 12.02	[13:00] Suzume no Gakkou event in Animate Shibuya
2001 12.02	[16:00] Suzume no Gakkou event in Shinseido Ikebukuro
2001 12.08	[15:00] Suzume no Gakkou Joukan event in Yamagiwa Soft
2001 12.08	[18:00] Suzume no Gakkou Joukan event in Ishimaru Soft One
2002 02.24	Muryou and Nadesico event in Ishimaru Soft One
2002 03.31	[15:00] Starchild Festival 2002 Spring
2002 04.11	[18:30] EX Driver the Movie event in Kudan Kaikan
2002 04.20	EX Driver the Movie talk at Cine Riible Ikebukuro 2
2002 04.27	EX Driver the Movie talk at Cine Riible Umeda
2002 07.07	Sister Princess vol 9 event at Gamers Tachikawa
2002 09.08	Bistro Cupid premium party
2002 09.21	[12:00] Tokyo Game Show 2002 Main Stage Bunka Housou Special
2002 09.22	[13:00] Tokyo Game Show 2002 Main Stage Sister Princess
2002 09.22	[15:00] Tokyo Game Show 2002 PCCW Japan booth
2003 06.21	[18:30] Mieno Hitomi Debut 10 Shuunen Kinen Talk Live
2008 03.29	[16:45] Tokyo Anime Fair 2008 Main Stage Soul Eater stage
2008 03.30	[12:00] Tokyo Anime Fair 2008 Media Factory booth
2011 01.22	[17:00] Tennis no Ouji-sama Teni Prix Festa 2011 in Budoukan
2011 05.22	[13:00/18:30] Rio Super Carnival 2 Zepp Tokyo