Sorry

Aimer
RADWIMPS (try listening to their Kimi no Na wa OST)
ONE OK ROCK (pronounced as one o'krock)
Sayuri

Can it be both male and female?

Female:
Lisa (solo)
Valshe (Solo)
Garnidelia (duo)
Eir Aoi (Solo)
Shikata Akiko (Solo)
Konomi Suzuki (Solo)
Myth & Roid (Solo)

Groups:
NICO touches the wall (male)
Wagakki Band (Mix)
Sid (Mix)

Srry, I can barely remember them off the top of my mind. If I remember more I'll tell you.

Babymetal

Uverworld
Mr. children
Flumpool
Amazarashi
Galileo Galilei
AAA
Aimer
Back Number
Union Square Garden
One Ok Rock
Bump Of Chicken
Hello Sleepwalkers
Sekai No Owari
Weaver
Gesu No Kiwami Otome
Yuya Marsushita
Atari Kousuke
SHINee (a Korean group, but has really good Japanese songs)

sorry, its Yuya MATSUSHITA. Not Marsushita

ONE OK ROCK & RADWIMPS I know them and love their voice and songs Σ(っ°Д °;)っ and I'll try to hear the other, thank u so much for recommendations <3<3

omg there a lot, so happy to see it, and yes both male and female im asking for, thank u sweety for your good recommendations <3 <3

thank u for recommendations <3 <3

wooohh wooooh so many, so happy for it, thank u so much for recommendations, it's a big help <3

yeees I know Shinee they're good ( I listen to kpop, but im more to japanese than koreans)

every one thank you for your reply and help, such a kind people you are <3 <3

I higly recommend
1.The mass missile
2. MUCC

I'll hear them, thank u sweety <3

<3