TIMELINE

Most of these dates come from Visunavi, it might not be 100% correct. Important dates are bold, magazine appearances are in italics.

2004
04 Soroban starts
06-17 Live Ikebukuro Cyber
06-17 Shirokuro radio sale, 100 copies.
06-18 Coeur de roi event. Takadanobaba area
06-18 Shirokuro radio sale, 30 copies
07-06 Live Shibuya O-Crest
07-12 Live Ikeburo Cyber
07-21 Live Urawa Narciss
08 Magazine appearance: Hevn (+ comment cd)
08-06 Takedababa area
08-12
Live Shibuya O-WEST
09-04 Live Meguro rock may kan
09-20 Live Roppongi Y2K
09-25 Live Shibuya O-Crest
09-25 Omnibus release: Hevn Kaizokuban
10
Magazine appearance: Hevn (+ comment cd)
10-06 "Free one coin one-man". Akasaka Lan (sold out on reservations)
10-20 Live Shibuya O-West
10-25 Live Harajuku Astro hall
11-01  -RAM-/Orange Tegami release (oricon indies charts 7th rank)
11-07 Yumehito performs with a session band. Takadanobaba area
11-13 Live Takedanobaba area
11-16 Live Harajuku Astro hall
11-28 Live Club holiday Shibaura
12
Magazine appearance: Hevn (+ comment cd)
12-12 -RAM-/Orange Tegami 2nd press release
12-23 Live Takedanobaba area
12-31 Battle of monster, Countdown event. Holiday Shinjuku

2005
01 Magazine appearance: Shoxx
01-05 Magazine appearance: Cure
01-08 Hevn event. Holiday Shinjuku
01-18 Like an Edison three- man event: 12012, Joker, Soroban. Shibuya O-Crest
02 Magazine appearance: Hevn (+ comment cd)
02-08 Hevn tour: OSAKA MUSE
02-09 Hevn tour: Nagoya Club Quattro
02-16 Hevn tour: Shibuya O-WEST
02-28 Ps Company presents: Bis & Soroban two-man. Shibuya O-West
03 Magazine appearance: Fool's mate
03 Magazine appearance: Shoxx (Expect Rush)
03-20 Live Meguro rock may kan
03-20 Momoiro no ichigo sale
04 Magazine appearance: Hevn (+ comment cd)
04-21 Live Meguro rock may kan
04-25 Magazine appearance: Hevn special edition
04-30 Enter brain event. Ebisu liquid room
05-01 Stylish wave '05 event. Shibuya Eggman
05-06 Enter brain event. Nagoya heart land
05-11 Hevn presents: Kalen, Zeek Soroban three-man event. Ikebukuro cyber
05-11 Charu sale
05-12 Charu sale
05-15 Hevn event. Yumehito performs with session band "Asorogy" as well. Meguro rock may kan
05-17 Hevn event. Esaka muse
06 Magazine appearance: Hevn
06-02 Hevn presents: Ruvie, Henzel, Soroban three-man event. Meguro rock may kan
06-04 Hevn tour: Nagoya bottom line.
         Soroban vs Shoujo Lolita 23 ku tour:
06-17 Takadanobaba area
06-17 Chaarii presales
06-20 Chaarii release
06-30 Urawa Narciss
07-02 Honyawata route 14
07-10 Yokohama sound hole
07-12 Nagoya Heartland
07-13 Osaka club mercury
07-18 Tour final: Takadanobaba area
07-25 Magazine appearance: Hevn special edition
08 Magazine appearance: Hevn
08-05 One-man, Takadanobaba area
08-05 Misui sale
08-22 Like an Edison event. Nagoya ELL
08-23 Act Unlawfully event. Osaka Big cat
08-24 Sora ni Hanabi release
08-24 In store event. Like an Edison Osaka
08-26 In store event. Like an Edison Nagoya
08-28 In store event. Like an Edison Tokyo
09 Magazine appearance: Hevn special edition
09-13 Hevn event. Shibuya O-east
09-20 Hevn event. Nagoya Club Quattro
09-21 Hevn event. Osaka muse
10 Magazine appearance: Hevn
10-10 Event. Shibuya O-east
10-19 P.S. Company event. Shibuya O-west 
12 Magazine appearance: Hevn
12 Magazine appearance: Hevn Hakkutsuban
12-19 Hevn event. Y2K Roppongi
12-23 Undercode special event. Osaka muse
12-27 Like an edison event. Nagoya E.L.L
12-31 Stylish wave count down. Yokohama aka renga souko

2006
01 Magazine appearance: Shoxx
01 Magazine appearance: Ura hevn ban 001
01-11 Geki Irodori Chappuru release
01-14 In Store event. Like an edison Tokyo
01-22 Koudou gestalt release (oricon indies charts 8th rank)
01-22 One man 'Hikari dou no aya' ikebukuro cyber
01-29 In Store event. Brand X
02 Magazine appearance: Hevn
02-18 Ginmio Hyderation release
02-18 One man 'Ginmio no aya' Meguru rock may kan
02-23 Hevn Omatsuri event. Nagoya bottom line
02-25 In Store event. Like an edison Nagoya
02-26 In Store event. Like an edison Osaka
03 Magazine appearance: Ura hevn ban 001
03-18 Kinmei Noubinharen release
03-18 One man 'Kinmei no aya' Takadanobaba area
04 Magazine appearance: Hevn
04-30 Event V-Rock Live Summit Act 1. Club Citta Kawasaki
05-04 Live Osaka Muse
05-06 Live Fukuoka Drum logos
05-08 Live Matsuyama Salon Kitty
05-10 Live Hiroshima Namiki Junction
05-12 Live Nagoya Bottom line
05-17 Live Shibuya O-east
08 Magazine appearance: Hevn
08-02 Soroban disbands. Last live at Shibuya O-east, O-west, O-crest, O-nest.