Before their formation was announced, only their photo (*excluding Takao Koma's) were publised on the book titled "A Moveable Feast Authorized by cali≠gari" released on March 2010. (See: SADIE,SADIE PLANET - 謎のミステリー)
They performed the first live show at the live event "DANSE OF NEU MODE N°2" organized by Takao Koma and held on May 2010, and disbanded (*they called it Taisan (退散)) at oneman live show on May 2011.
And in 2013, They joined live event twice with limited reunion.
| 5-29 | Live Event [DANSE OF NEU MODE N°2] | LOFT / Shinjuku, Tokyo |
| 8-17 | Official Website OPEN | |
| 11-16 | 2-Man [XA-VAT vs CUCKOO (カッコー)] | ASTRO HALL / Harajuku, Tokyo |
| 11-30 | bounce Henshūbu no Ima Koko. "XA-VAT、すでにヴェールを脱いでいた???" | bounce / TOWER RECORDS ONLINE |
| 12-01 | Shūji Ishii Long Interview "XA-VAT『XA-VAT』" | bounce / TOWER RECORDS ONLINE |
| Közi Interview | FOOL'S MATE vol.351 (Jan. 2011) | |
| 12-02 | 1-Man [XA-VAT] | LIQUIDROOM / Ebisu, Tokyo |
| XA-VAT | 1st Single (2 types) | |
| Shūji Ishii Interview "石井秀仁が明かすXA-VATの正体と岡村ちゃんとの仕事" | Natalie | |
| 12-22 | Live Report @Ebisu LIQUIDROOM | bounce / TOWER RECORDS ONLINE |
| 12-25 | M-ON! ASAHI SUPER DRY The LIVE NAVI (Aired about the oneman live show @Ebisu LIQUIDROOM) | MUSIC ON! TV |
| 12-29 | Live Report @Ebisu LIQUIDROOM and Interview to Shūji Ishii and SADIE PINK GALAXY | FOOL'S MATE vol.352 (Feb. 2011) |
| 1-05 | Shūji Ishii "The 3 Best Albums of 2010" (OPUS OF THE YEAR - pt.3) | bounce / TOWER RECORDS ONLINE |
| 2-24 | Shūji Ishii Interview "About XA-VAT" | Vif / ROCK MUSIC NAVIGATION SITE |
| 2-28 | Shūji Ishii and Közi Interview | FOOL'S MATE vol.354 (Apr. 2011) |
| 3-16 | 艶℃ (END) | 1st Album (3 types) |
| Shūji Ishii Interview and Introductions of 艶℃'s Remixers by XA-VAT's members etc. "XA-VAT 艶℃" | bounce / TOWER RECORDS ONLINE | |
| Shūji Ishii and Takao Koma Interview "XA-VAT 艶℃ Interview" | iLOUD | |
| 3-17 | Shūji Ishii Interview "XA-VAT石井秀仁「艶℃」に詰め込んだ感覚的なカッコよさ" | Natalie |
| 3-19 | Instore Event at Osaka *Talk Event by Shūji Ishii and SADIE PINK GALAXY |
TOWER RECORDS NU chayamachi / Umeda, Osaka |
| 3-31 | Shūji Ishii and Takao Koma Interview | LOUD No.196 |
| 4-03 | Instore Event at Tokyo *Talk Event by Shūji Ishii, Közi and Takao Koma |
TOWER RECORDS Shinjuku / Tokyo |
| 4-08 | bounce Henshūbu no Ima Koko. "『Lovesexy』現象やら、インストアの裏側やら" | bounce / TOWER RECORDS ONLINE |
| 4-27 | Event [Oto no Mirai Special (+ DANSE OF NEU MODE [NIGHT MODE])] | LOFT / Shinjuku, Tokyo |
| 5-03 | M-ON! (Aired MV, Comment and Instore Event at TOWER RECORDS Shinjuku on Apr. 3) | MUSIC ON! TV |
| 5-08 | 1-Man [XA-VAT JAPAN TOUR] | AKASO / Umeda, Osaka |
| 5-12 | 1-Man [XA-VAT JAPAN TOUR] *Disbanded, they called it "Taisan" |
LIQUIDROOM / Ebisu, Tokyo |
| 3-31 | Event [Bobby Festival ~VERY BEST OF CHOCKYU~] *Limited Reunion for Chockyu 10th anv. and memorial event for Bobby Yuasa |
STUDIO COAST / Shinkiba, Tokyo |
| 8-02 | Event [Salon du Détester #4] | LOFT / Shinjuku, Tokyo |
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