| January | |
| 01 | "NEO UNIVERSE" Commercial image song for Shiseido "Pienu" Unreleased in Japan "get out from the shell" Commercial image song for Toyota （This commercial is O.A. as a campaign targeted at young people throughout Asia |
| 19 | 19th single "NEO UNIVERSE / finale" release *Oricon chart first appearance No.1 （Double A side maxi single） |
| 22- | "finale" Theme song, "hole"(Maxi single "NEO UNIVERSE / finale" c/w) track in movie for Toho movie "Ring0-Birthday" |
| March | |
| 15 | 14th GOLD DISC AWARD（NHK） （Single "HEAVEN'S DRIVE" -receive Song of the Year!） （Single "NEO UNIVERSE / finale" album "ark" "ray" -receive Rock Album of the Year!） |
| 16- | Canon "Wonder BJ" Commercial image song Renewed from "LOVE FLIES" to "finale" |
| April | |
| 07 | Start sending latest news from NTT Docomo i-mode and J-PHONE J-Sky Web |
| 17 | Chakushin Melody Service starts for New track "STAY AWAY（release date, title undecided at that time)" （Distribute 200,000 flyers on Chakushin Melody data at record shops throughout Japan） |
| 21 | L'Arc～en～Ciel Official Fan Club name changed from "Ciel" to "LE-CIEL" |
| May | |
| 17 | Start sending latest news from IDO･Celluar・TU-KA EzWeb Service （Start service at all cell phone companies ) |
| June | |
| 28 | Re-mix album "ectomorphed works" release |
| 30 | 1998 summer Post card size of "L'Arc～en～Ciel LIGHT MY FIRE" (which is sold exclusively at convenient stores) on sale （released from SHINKO MUSIC） |
| July | |
| 01 | New single (to be released on 19th) "STAY AWAY" Commercial image song fro Shiseido "Pienu" |
| 19 | 20th single "STAY AWAY" release *Oricon chart first appearance No.2 A human game where hyde deformed and designed the members, and where the characters run "Gekitotsu! Tomalaruku"（PlayStation game) release |
| 22 | Live performance at TOKYO FM Shibuya Spainzaka Studio "Count Down Station" |
| August | |
| 30 | 8th album "REAL" release Official band score "LOVE FLIES" "NEO UNIVERSE" "STAY AWAY" release |
| September | |
| 20 | Official band score "REAL" release |
| October | |
| 08 | Live House Tour "CLUB CIRCUIT 2000 REALIVE" starts from Akasaka BLITZ |
| 09 | Akasaka BLITZ |
| 16 | Zepp Sendai |
| 17 | Zepp Sendai |
| 19 | Zepp Tokyo |
| 20 | Zepp Tokyo |
| 23 | Zepp Sapporo |
| 24 | Zepp Sapporo |
| 26 | Zepp Osaka |
| 27 | Zepp Osaka （5 venues, 10 performances） |
| Middle | Official band score "niji" "winter fall" "DIVE TO BLUE" "HONEY" "Kasou" "Shinshoku ～lose control～" release |
| November | |
| 04 | Dome tour "TOUR 2000 REAL" starts from Nagoya Dome |
| 05 | Nagoya Dome |
| 11 | Osaka Dome |
| 12 | Osaka Dome |
| 18 | Fukuoka Dome |
| 19 | Fukuoka Dome |
| Latter Half | Official band score "snow drop" "forbidden lover" "HEAVEN'S DRIVE" "Pieces" "Driver's High" release |
| December | |
| 02 | Tokyo Dome |
| 03 | Tokyo Dome |
| 05 | Tokyo Dome A limited time site is opened for the Tokyo Dome gig, and streamed live on "yahoo!Broadcast" |
| 06 | Tokyo Dome Live coverage of "L'Arc～en～Ciel TOUR 2000 REAL" on Sky Perfect TV! hyde･tetsuya･ken･yukihiro each has their own channel （Also streamed live on cell phone service "LE-CIEL NET" for the first time in history） （4 venues, 10 performances / 411,000 people） |
