Some of the events that Mariko has appeared in during the year 1998 are as follows.

1998 01.17	Kouda Mariko concert
1998 01.18	Kouda Mariko concert
1998 03.08	Kouda Mariko mini-live and talk show at Tower Records
1998 03.22	Tokyo Game Show Spring 1998
1998 08.25	Mariko Kouda Concert Tour 1998 in Saitama
1998 09.05	Mariko Kouda Concert Tour 1998 in Nakano Sun Plaza
1998 09.06	Mariko Kouda Concert Tour 1998 in Nakano Sun Plaza
1998 09.09	Mariko Kouda Concert Tour 1998 in Sendai
1998 09.12	Mariko Kouda Concert Tour 1998 in Fukuoka
1998 09.19	Mariko Kouda Concert Tour 1998 in Osaka
1998 09.23	Mariko Kouda Concert Tour 1998 in Shibuya