What Japanese bands/singers have you seen live?

L'Arc~en~Ciel - 20th L'Anniversary (Hongkong)

VAMPS - Jakarta

Miyavi in 2009 and X Japan in 2011 :D

Tohoshinki count? lmao.
anyway....
2009:
- Tohoshinki 4th Live Tour "The Secret Code" in Nagoya

2014:
- Tohoshinki Live Tour 2014 "TREE" in Tokyo Dome
- Hey! Say! JUMP 'Live With Me' in Tokyo Dome

that's all! :3

I've seen Angelo, LUNA SEA and Utsunomiya Takashi 2 times :D  

Never seen any concerts *in* Japan. Fortunately a few of them do come overseas.

Puffy
Amuro Namie
Utada Hikaru
Anri (?!!)

ONE OK ROCK in 2015

One OK Rock - once in the Philippines, once in Japan

KisMyFt2 - Osaka

Akanishi Jin - Kyoto