- 1998-07-00 Session band ZXS is formed by vocalist CHIHIRO (チヒロ) and drummer souichiro, with support from SYUREN and Maki (麻輝).
- 1998-07-00 【lineup】 V. CHIHIRO (チヒロ) / D. souichiro / Support G. SYUREN / Support B. Maki (麻輝)
- 1998-09-00 Support guitarist SYUREN and support bassist Maki (麻輝) officially join, and ZXS officially begins activities.
- 1998-09-00 【lineup】 V. CHIHIRO (チヒロ) / G. SYUREN / B. Maki (麻輝) / D. souichiro
- 1999-08-25 Alter-ego band BUG#99 performs.
- 2000-01-23 Tour begins.
- 2000-03-10 Tour final is held at Meguro (目黒) ROCKMAYKAN (鹿鳴館).
- 2000-04-09 First oneman is held at Shinsaibashi (心斎橋) BAHAMA.
- 2000-07-21 Oneman is held at Shinsaibashi (心斎橋) NEST SALOON.
- 2000-08-10 Oneman is held at Nagoya (名古屋) MUSIC FARM.
- 2000-08-12 Oneman is held at Meguro (目黒) ROCKMAYKAN (鹿鳴館).
- 2000-12-13 Oneman is held in Tokyo (東京).
- 2000-12-19 Oneman, [CURE], is held at Sennichimae (千日前) CRUST.
- 2002-07-26 ZXS and KAFKA (カフカ) hold last live at Esaka (江坂) BOOMIN HALL and disband.
- 2002-07-26 ZXS disbands.