| January | |
| 04 | Limited-time full stream of "BLESS" Music Clip on the video site GyaO Also, comments from members! |
| 06 | New Single"BLESS" available on Chaku-Uta® |
| 13 | "BLESS" chosen as the theme song to NHK Vancouver's broadcasts in 2010 Source: the "BLESS" Song performance at NHK Hall |
| 24 | TV Performance: NHK's "MUSIC JAPAN" |
| 27 | 36th Single"BLESS" released. Debuts on Oricon at #2! Chosen as the theme song to NHK Vancouver's broadcasts in 2010! Sony Music Online Japan sitejack: for 24 hours, the "BLESS" Music Clip full stream and TV SPOT were viewable! With comments from members! At the mobile site, a mobile wallpaper was given as a present! BASS MAGAZINE SPECIAL FEATURE SERIES "tetsuya/L'Arc～en～Ciel" on sale (L'Arc～en～Ciel bassist and frontman tetsuya relates true band stories and some of the permanent photo archive) |
| February | |
| 14 | TV performance: NHK's "MUSIC JAPAN" ("BLESS" Full Orchestra version) |
| March | |
| 01 | "QUADRINITY ～MEMBER'S BEST SELECTIONS～" on Music Portal Site "Net de L'Arquiz" opens! tetsuya's ESP GALLERY OPEN！ (This GEAR GALLERY features tetsuya's documents and comments relating to all the ESP models since the beginning!) ken"Houdan Gahou X" on sale (Contains the consistenly popular ken from L'Arc～en～Ciel's thoughts on all sorts of topics) |
| 02 | The band performs in a "PEPSI NEX" TV commercial! Part of a "PEPSI NEX" series - "L'Arc～en～Ciel" Edition (Nationwide broadcast) |
| 09 | Sony Music Online Japan sitejack: For 24 hours, "QUADRINITY ～MEMBER'S BEST SELECTIONS～" TV spots were viewable in all 15 patters！At the mobile site, a mobile wallpaper was given as a present! A limited edition full music clip of "QUADRINITY ～MEMBER'S BEST SELECTIONS～" was viewable at video site GyaO! |
| 10 | Best Album"QUADRINITY ～Trans ASIA via PARIS～" released Debuts on Oricon at #2 "PEPSI NEX" TV-CM tie-up single "I Love Rock'n Roll" released as a limited-edition Chaku-Uta® ☆Debuts at #1 on the daily chart |
| 14 | Announced as "HEADLINER" for March on Music Video Channel VMC For the month, VMC plays music clips by L'Arc～en～Ciel |
| 20 | The Third J-MELO Awards Most Requested Act of 2009 Award! Chosen as the listener-requested No. 1 Artist on NHK WORLD"J-MELO", broadcast to 180 countries around the world L'Arc～en～Ciel won the award for the 3rd year running! |
| 31 | LIVE DVD "TOUR 2008 L'7 ～Trans ASIA via PARIS～" released, Debuts on Oricon at #2 L'Arc～en～Ciel Official Textbook "WORDS Ⅱ" on sale "I Love Rock’n Roll" Chaku-Uta Full made available 3/31 ☆Debuted at #1 on the daily chart |
| August | |
| 21 | "L'A HAPPY NEW YEAR！" announced at JACK IN THE BOX 2010 SUMMER |
| November | |
| 24 | 33rd Single"Hurry Xmas" 2010 version released |
| December | |
| 24 | Performance on Tv Asahi's "MUSIC STATION SUPER LIVE 2010" |
| 31 | Performance on NHK's 61st annual Kōhaku Uta Gassen |
