Let's see... this is probably going to be kinda long, but I think I have just about everything listed XD
SID - Anime Central, 2004
The Pillows - Anime Central, 2005
TsuShiMaMiRe - Anime Central, 2006
High And Mighty Color - Anime Central, 2007
DIR EN GREY - House of Blues, Chicago, 2007
BLOOD - Subterranean, Chicago, 2007
BLOOD - Subterranean, Chicago, 2008
ayabie - Logan Square Auditorium, Chicago, 2008
DIR EN GREY - Sunshine Theater, Albuquerque, 2010
Inugami Circus-dan / SEIKIMA-II - A-Kon, Dallas, 2010
Jikkendai Marmot / taa. - Yotsuya SOUND CREEK Doppo, 2012/12/13
dieS / DISH / emmuree - Meguro LIVE STATION, 2012/12/14
Ensoku / TOKYO HEROES / 【MU:】 / PLUNKLOCK / THOMAS - Motoyawata ROUTE 14, 2012/12/15
Lin feat. Sui / NEGA feat. CO- / Megaromania feat. Yui / FUTURISM・BOYZ feat. RIKU / CindyKate feat. Rayka / REALies feat. Jin / Suzaku feat. Lara / Vior gloire feat. Itsuki / Cu[be] feat. Shall - SHIBUYA-REX, 2012.12.16
A - SHIBUYA-REX, 2012/12/17
kiss my way / hone(kari) / Shibirubashir / Suzaku / Hi:BRiD / AMARANYX / Hresvelgr / BLACK PEARL - Shinjuku RUIDO K4, 2012/12/18
Zetsurin Haguki - Shibuya SONGLINES, 2012/12/19
Rainman / Mujina / LakuGaki / Kimi wa surudoku. / Zig+Zag - Takadanobaba AREA, 2012/12/20
chariots / KISAKI PROJECT feat. Satsuki / Megaromania / LuLu / Gallo / DEZERT / GALEYD / LIPHLICH / DEPAIN - SHIBUYA-REX, 2012/12/21
Primrose(Soroban) / Blu-BiLLioN / heidi. / L&DS / Neverland - Shibuya O-WEST, 2012/12/22
Kanabun / Kharin A.K. / GIGAFREAKS / MiU / RoViN / DANGER☆GANG / Asuka Session - Shinjuku RUIDO K4, 2012/12/23
Satsuki - Shibuya RUIDO K2, 12012/12/26
Codomo Dragon / VelBet / cocklobin / amber gris / Carat / HanaShounen Baddies / the LEM / Temari session / Baku session - Takadanobaba AREA, 2012/12/27
FULL EFFECT' / SRASH NOTES GARDEN / Fi'Ance / Neverland / Le-Vert / Shyena Teikoku / Shounenki / Stealth Mania / D'uAl / LakuGaki / RedruM / the Sherry / Circus / MIL / 「xxx」is D£AD / MeleM - Ikebukuro BlackHole, 2012/12/28
DIV / Codomo Dragon / Dear L'Novel / ALSDEAD / Tokyo Quartet / Habu Rengou / Elm / Jokart au legal / GAKIDO / TRUST / GALEYD - Ikebukuro EDGE, 2012/12/29
Black Gene For the Next Scene / Signal / Avidit. / Gallo / Wizard / Rono☆Cro / FENRIL / Carat / VANISH / VENOM / SERIAL⇔NUMBER / Grieva / DOPES. - Ikebukuro EDGE, 2012/12/30
6→7 / AMARANYX / ANSIA / colobocc / DANGER☆GANG / dolore / Dieu / JyuLie / KING / L / LAYZis / MeleM / 【MU:】 / Neverland / OROCHI / Riot Labyrinth / ROMiO / Rubik / Secilia Luna / Tokami / SERIAL⇔NUMBER / GaGaGaGa / Grieva / Misaruka - Ikebukuro CYBER, 2012/12/31
SIVA Session / gossip Session / Panic Channel Session / ex.NEXX Hide Session - SHIBUYA-REX, 2013/01/07
Jikkendai Marmot / TЯicKY / colobocc / Hyper Pocket / Ash'D soul / HERe:NE - Ikebukuro RUIDO K3, 2013/01/08
Annie's Black / GALEYD / Grieva / D.I.D. / DOPES. / NEGA / BIOSPHIA / R'evolv / SCAPEGOAT / FULL EFFECT' / RUSH - SHIBUYA-REX, 2013/01/09
TOKYO HEROES / cocklobin / DISH / dieS / cat fist / Capella - Ikebukuro EDGE, 2013/01/11
ALSDEAD / GALEYD / Glam Grammar / LOST ASH / DISH / dieS / †яi¢к / Duel Jewel / And / Inpossible - Shinjuku LOFT, 2013/01/12
Kameleo - Shinjuku BLAZE, 2013/01/13
GHOST HARLEM / Byakura / EVIL VAIN / Ragzis / Childish Trick - Shibuya CYCLONE, 2013/01/14
Lustknot. / Black Klaxon / One★Star / AvelCain / JokArt au Legal / Tomodachi / Xepher / MIL - Ikebukuro CYBER, 2013/01/16
There's way too many to comment on specifically, but my favorite was probably the Jikkendai Marmot x taa. two-man live. It was my first live in Japan and was at a tiny bar with a couple of small tables right next to the stage. Being able to see my favorite band in such an intimate climate as that really just made my whole life complete XD
Also, those lives at the end of 2012 were totally brutal, with the new year's eve live running about 16 hours long x_x