Utada Hikaru
Ai Otsuka
Anna Tsuchiya
Onmyo-Za
Head Phones President
Akira Yamaoka (former Silent Hill composer)
Nobuo Uematsu (majority of composing Final Fantasy titles)

Well mine is
1- SCANDAL  
2- Hyde  .nosebleed. 
3- Nightmare   
4- X Japan  .cool. 
5- Vamps 
6- An Cafe
7- The Gazatte
8- ABC ( Acid Black Cherry )
9- Uverworld
10- SID

- Scandal
- Maon Kurosaki
- Miwa
- Silent Siren
- The Sketchbook
- Show Ya
- AKB48

- Scandal
- Asian Kung Fu Generation
- ViViD
- Miwa
- FLOW
- SID
- One Ok Rock
- NICO Touches The Walls

- SCANDAL
- Akiakane (singer, not the band)
- Kalafina
- Soutaiseiriron 
- Yousei Teikoku
- Ryoko Shintani
- eufonius
- Olivia
- Lia
- Ieiri Leo

- SCANDAL of course  .happy. 
- STEREOPONY  .love. 
- Zone
- LiSA
- Ikimono Gakari
- Silent Siren
- Eir Aoi

(SCANDAL not included because it's kinda clear I love it^^ I wouldn't be on this forum if I didn't)

- Morning Musume. (first group I got into)
- Berryz Koubou (one of my two current favourite groups)
- C-ute
- S/mileage
- Up Up Girls (second of my two current favourite groups)
- Utada Hikaru (first solo singer I got into)
- Nishino Kana
- Otsuka Ai
- AKB48
- HKT48
- May J

These are the ones I listen to the most at the moment.

1. Morning musume
2. Babymetal
3. SCANDAL
4. Kyary Pamyu Pamyu
(no particular order)
- fripside
- hatsune miku
- juice=juice
- lovendor
- nishino kana
- aya hirano

Heheheh

SCANDAL, Luna Haruna, DobonDobon, Almond Crush, Perfume, Utada Hikaru, Ikimono Gakari, Kyary Pamyu Pamyu, LiSA, One Ok Rock, Stereopony, YUI, Silent Siren, Eir Aoi, Momoiro Clover Z, BABYMETAL, HALLOWEEN JUNKY ORCHESTRA, CHEESE CAKE, Nogizaka46

- Judy and Mary (just a few people did put them in their list, so I'm assuming most members in here never listened to this awesome band!)

- Scandal. Do I have to explain? :p

- Chatmonchy. Recently discovered.

- Tokyo Jihen. Not my style 100%, but they blow my mind.


Not a fan, but I like a lot of songs:

L'arc en ciel
Every Little Thing
TM Revolution
Ikimono gakari

Respect them, but never listens.

UVERworld
Malice Mizer

Most of them are j-rock bands.

SCANDAL (obviously);
N' Shukugawa Boys;
ONE OK ROCK;
SPYAIR;
Shounen Knife;
PUFFY;
Perfume;
Kyary Pamyu Pamyu;
Tommy heavenly6;
The Brilliant Green.

These are the ones I remember for now.

SCANDAL
Nico touche's the walls
SPYAIR
AKB48
MAN WITH A MISSION
Morning Musume
YUI
Aqua Timez
L'Arc-en-ciel
Totalfat
Uverworld

i like thats all ! .wow.

Ichiro Mizuki
Mitsuko Horie
Hironobu Kageyama
Maasaki Endoh
Rica Masumoto
Masami Okui
Sasaki Isao

Pretty Much a bunch of old geezers

and OFC Scandal!

ＳＣＡＮＤＡＬ
supercell
Itsue
SECONDWALL
goosehouse
Fear, and Loathing in Las Vegas

I feel im forgetting some..

SCANDAL
ONE OK ROCK
Fear, and Loathing in Las Vegas 
Shota Shimizu

Band:
Scandal
L'arc~en~Ciel
the Gazette
Fear, and Loathing in Las Vegas
One Ok Rock
AKB48, SKE48, NMB48, HKT48
Monkey Majik

Solo:
YUI
Miyavi
Utada Hikaru
Ayami Muto
Atsuko Maeda
Itano Tomomi
Watanabe Mayu

well about that much..   .smile.