Some of the events that Mariko has appeared in during the year 1999 are as follows.

1999 01.23	Kokoha Ooedo Kagurazaka public recording
1999 02.26	Event in MHV Yokohama
1999 03.07	Event in HMV Shinsaibashi
1999 03.28	Ninki Seiyuu Festival in Kyoko
1999 05.07	Kouda Mariko concert tour 99 in Saitama
1999 05.08	Kouda Mariko concert tour 99 in Aichi
1999 05.14	Kouda Mariko concert tour 99 in Sendai
1999 05.23	Kouda Mariko concert tour 99 in Nakano Sun Plaza
1999 05.24	Kouda Mariko concert tour 99 in Nakano Sun Plaza
1999 06.05	Kouda Mariko concert tour 99 in Fukuoka
1999 06.11	Kouda Mariko concert tour 99 in Chiba
1999 06.13	Kouda Mariko concert tour 99 in Osaka
1999 06.19	Kouda Mariko concert tour 99 in Gunma
1999 09.18	Kouda Mariko Special Summer Live 99 Aozora de Aishiteru 2nd Touch
1999 10.02	Voice Festival 2000
1999 10.03	Voice Festival 2000