[Utena]

^ that's quite old news though, back when Ami was under Sony Music Japan
From wikipedia

In 2000 Suzuki's career came to an abrupt halt when Eiji Yamada, the President of her production company AG Communication, was convicted on tax evasion charges. AG Communication was avoiding tax by underreporting their earnings, and by consequence were underpaying royalties to artists. Suzuki Ami's parents Tadao and Miyako Suzuki[2] sued AG Communication for termination of her contract on these grounds, and that the association would taint her squeaky clean image. They attempted to set up a subsidiary called Music Tribe to solve the problem. The Tokyo District Court found in her favor, but the lawsuit resulted in Ami Suzuki's blacklisting because of an unwritten rule of the entertainment business in Japan: artists who get into legal disputes with their masters are blacklisted.[3]
In court documents it was revealed that AG Communication was paying her very little to begin with: Despite eight-figure record sales that year, Ami Suzuki earned just $1500 a month at the start of her career, and a minuscule 0.4% royalty rate on CDs, raised to $9780 and 0.55% in 1999.[6]
Having lost all of her endorsements too, Ami was faced with the problem of production companies refusing to sign her and tried to make a comeback in the next two years with little to no success. Her relationship with her producer, Tetsuya Komuro, also ceased. Many people were convinced that her chances for making a comeback were nil.[7] In 2003, Ami finally negotiated an out-of-court agreement with Sony. Her contract with the label was scheduled to end in December 2004.[7]
Eiji Yamada was subsequently fined for his role in the tax evasion. Government officials linked to the scandal included former Education Minister Takashi Kosugi and two other legislators, who allegedly received 34 million yen in unofficial payments for referring AG Communication and other clients seeking tax evasion.[3]
Particular credit for covering Suzuki Ami's legal problems goes to music journalists Steve McClure writing for The Japan Times and Rori Caffrey for the Daily Yomiuri. The blacklisting was not discussed in the mainstream Japanese Press, and McClure himself was warned against reporting it, but claims that getting court records themselves was fairly easy.[2]
Of the period, Suzuki herself has said "I really didn't know what was going on, lots of lies were being thrown about in the media. For people to hear little things on the TV and believe that to be the truth was a surprise, and I suddenly realized the kind of world I was in. What kept me going was the thought of one day being able to tell the truth myself"[2]