[Mirrorcle Monster]

Utada Hikaru - First Love

With almost 8 million copies sold, it is the highest selling album ever in Japan. Plus, its singles sold another 4 million copies

Biggest hits: Automatic, Movin' on without you, First Love

Mai Kuraki - Delicious Way

Although she's nowhere to be seen on the charts now, Mai Kuraki actually had a massive debut. The album sold 3,5 million copies, with its singles selling 3,7 million copies

Biggest hits: Love,Day After Tomorrow, Stay by my side, Secret of my heart

Ayumi Hamasaki - I Am...

The album elevated her as the pop empress, sold 2,3 million copies, with its singles selling almost 6 million copies

Biggest hits: M, Dearest, evolution

Namie Amuro - SWEET 19 BLUES

She sold 3.4 million copies of the album, and 4,8 million copies of its singles

Biggest hits: Chase the chance, You're my sunshine, Don't Wanna Cry

Koda Kumi - Black Cherry

She sold over 1 million copies with the album, she became a selling force thanks to it, and managed to move another million copies of its singles

Biggest hits: Koi no Tsubomi, Yume no Uta, With your smile

Kana Nishino - to LOVE

In 2010 Kana was EVERYWHERE. Every magazine, tv show, billboard... And the album just proves it. The album has sold almost 800.000 copies, with it singles being digital monsters and selling almost 5 million copies digitally

Biggest hits: Dear..., Aitakute Aitakute, Best Friend

YUI- Can't Buy My Love

YUI took the J-Pop world by storm with this album, which sold 700.000 copies and sold almost 500.000 copies

Biggest hits: Goodbye Days, Rolling Star, CHE.RR.Y

Ai Otsuka - LOVE COOK

Ai's peak album, selling almost 900,000 copies, with single sales of 700.000 copies

Biggest hits: Planetarium, SMILY, Biidama

Mika Nakashima - TRUE

The it girl of 2002 was Nakashima Mika, selling 1.1 million albums and 900.000 singles

Biggest hits: STARS, WILL, CRESCENT MOON

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Those were the ones I could think of, any other you suggest? (I'm sure there are tons)


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EDIT

ayaka - First Message

Her massive debut sold 1.2 million copies, with its singles selling over 625.000 copies

Biggest hits: Mikazuki, I believe

Kahala Tomomi - LOVE BRACE

This 90s superstar sold 2,4 million copies of her album, and 3 million copies of its singles

Biggest hits: I BELIEVE, I'm proud

BoA - VALENTI

One of the few korean female acts to make it big in Japan, she sold 1,3 million albums and 500,000 singles

Biggest Hits: VALENTI, JEWEL SONG