- 2002-11-00 COLOREAL ZPT is formed in Osaka (大阪) by vocalist Ito Youji (伊藤 陽史) and drummer Nishiguchi Shougo (西口 昇吾).
- 2003-02-00 SUN WEST released.
- 2003-02-00 Kimihe no Uta released.
- 2003-02-23 PLAY MUSIC! PEACE LIFE! released.
- 2003-03-00 Formation celebration first oneman, やてまえ!!ゼプト!! (やてまえ!!ゼプト!!), is held at Sennichimae (千日前) CRUST. All tickets sell out, and the livehouse's attendance record is broken.
- 2003-06-00 Bassist Nishimura Toru (西村 透) secedes, due to personal reasons.
- 2003-06-00 Muneishi Keisuke (宗石 啓介) [ex-SCRYD] begins as support bassist.
- 2003-06-18 FAN~FAN~ released.
- 2003-07-00 Bassist Muneishi Keisuke (宗石 啓介) officially joins.
- 2003-07-00 COLOREAL ZPT restarts activities.
- 2003-08-00 A to Z released.
- 2003-08-00 Single release celebration Osaka-Tokyo-Nagoya tour, Tsukinukeru! ZPT! 2003 (突き抜けろ!ゼプト! 2003), begins.
- 2003-08-06 Tsukinuketeku released.
- 2003-09-00 Tour final, Dasshu~DASH~ Vol.1 (奪取~ダッシュ~ Vol.1), is held.
- 2003-12-00 Kumo ga Haretara released.
- 2003-12-00 Netsugen released.
- 2004-09-00 Guitarist secedes.
- 2004-09-00 Yoshida RYOU (吉田 リョウ) [ex-1METER] joins as guitarist.
- 2004-11-00 Tour KIMI NO HIKARI ga Demashita (キミノヒカリが出ました) begins.
- 2004-11-00 KIMI NO HIKARI released.
- 2004-12-00 Drummer G.O.D and bassist Nishida Misaki (西田 岬) join.
- 2004-12-05 Tour final oneman, Yatemae! Zetsufuuto! (やてまえ!絶風斗!), is held at Minamihorie (南堀江) KNAVE.
- 2005-02-00 COLOREAL ZPT restarts activities.
- 2005-02-00 RUSH released.
- 2005-03-00 COLOREAL ZPT appears on radio channel FM85.1.
- 2005-04-00 Sponsored event, [MISSION TO WILD], is held.
- 2005-06-00 COLOREAL ZPT vs HYBRID FREAKS co-sponsored two-day live event, [STYLE OF EXTREME PRIDEZ], is held.
- 2005-06-10 Tour S・D・W・K begins.
- 2005-09-03 Tour final sponsored event, [MISSION TO WILD] Ver.2, is held at Minamihorie (南堀江) KNAVE.
- 2005-10-00 Drummer G.O.D breaks his finger before a live, and has to play one-handed for several shows.
- 2005-11-01 COLOREAL ZPT is featured artist at nationwide convenience store MiniStop, through 2005-11-30.
- 2005-12-11 Twoman with BARBELL (バーベル), [MISSION TO WILD] Ver.3, is held.
- 2006-01-28 Threeman is held at Minamihorie (南堀江) KNAVE.
- 2006-02-25 Sponsored event, [MISSION TO WILD] Ver.4, is held at Minamihorie (南堀江) KNAVE.. The event is sold out.
- 2006-03-19 Guitarist Yoshida RYOU (吉田 リョウ) suddenly passes away. COLOREAL ZPT vows to continue as a 3-member band.
- 2006-05-03 Gekijou released.
- 2006-05-11 COLOREAL ZPT announces that they will move activities to Tokyo (東京) after their 2016-05-31 live.
- 2006-07-21 Two-day sponsored event and memorial for deceased guitarist Yoshida RYOU (吉田 リョウ), [Rinkiouhen] ~Osakahen~ [MISSION TO WILD] Ver.5 ([臨機応変] ~大阪編~ [MISSION TO WILD] Ver.5), is held at Minamihorie (南堀江) KNAVE.
- 2006-07-23 Two-day sponsored event and memorial for deceased guitarist Yoshida RYOU (吉田 リョウ), [Rinkiouhen] ~Kyotohen~ [Summer Dream] ([臨機応変] ~京都編~ [Summer Dream]), is held at KYOTO MUSE.
- 2006-12-18 Sponsored event, GO! GO! ROCKET PARTY, is held at Shibuya (渋谷) deseo.
- 2006-12-18 Yumemiru ROCKETMAN released.
- 2007-03-18 Sponsored event in memorial of the anniversary of Yoshida RYOU's death is held at KYOTO MUSE. On this day, COLOREAL ZPT changes their name to ZPT (ゼプト). (Note: since there was almost no activity as ZPT, I have not changed their name in the database.)
- 2007-12-23 The band holds its first live as ZPT.
- 2009-06-04 COLOREAL ZPT performs (under original name) for the first time in a year, with support guitarist Miyaji YASUAKI (宮路 ヤスアキ). Although the band makes no announcements about their activity, they never perform again.
- 2009-06-04 COLOREAL ZPT unofficially ends activities