Background: Jin Akanishi (Chi Xi  Ren , Akanishi Jin, born July 4, 1984) is a Japanese musician, singer, songwriter and actor. He has been active since 1998, first as one of the two lead vocalists of the popular J-pop boy-band KAT-TUN. Since the group's official debut in 2006, they have achieved 14 consecutive number ones (including studio albums) on the Oricon charts. In 2009, Akanishi started his solo career, and since then has released two studio albums (Japonicana, #JustJin), and two mini albums (Test Drive, Mi Amor).
Context: At the event of Tokyo Girls Collection on September 5, 2009, Jin appeared as a special guest to promote his new movie, Bandage, and he performed the movie's theme song which marked this as the solo debut under the temporary band unit, LANDS, with Takeshi Kobayashi, the producer of Mr. Children. Kobayashi wrote the lyrics and music of their debut single "Bandage". It was released on November 25, and debuted at number one on the Oricon charts. In 2010, on January 13, was released the studio album Olympos, which also topped the Oricon charts. On January 19, the band held their only live concert, titled LANDS Last Live.  Akanishi had a series of solo concerts, titled "You & Jin", comprising a total of 32 shows from February 7 to February 28, 2010. The song "A Page", he co-wrote, composed and arranged, featured at his concerts, was released as part of KAT-TUN's 11th single, "Love Yourself (Kimi ga Kirai na Kimi ga Suki)", on the 2nd limited edition. On June 19 and 20, Akanishi's solo tour "You & Jin" had a 3 sold-out show tour in Los Angeles, California.  In the last show of his "You & Jin" concert Akanishi announced a tour in the United States. In July, Akanishi announced that he would permanently leave the band KAT-TUN, becoming a solo artist of Johnny & Associates. On September 16, were released dates for Akanishi's November tour "Yellow Gold Tour 3010", named after the tour's title song "Yellow Gold", and the cities included were Chicago, New York City, Houston, Los Angeles and San Francisco. The tour featured songs entirely in English, mostly written and produced by the Akanishi himself.  On December 9, 2010, it was announced that Jin will be joining the Warner Music Group and Warner Music Japan on a global basis and became responsible for his recording career in both English and Japanese language. After the "Yellow Gold Tour 3010" ended with success, Jin returned to Japan to held "Yellow Gold Tour 3011" with total 12 concerts in Osaka-jo Hall, World Memorial Hall, Nippon Budokan and Saitama Super Arena.
Question: Did he give a reason for leaving?

Answer:
becoming a solo artist of Johnny & Associates.