In a Tweet from his @shotakageyama account on January 1st, 2014, Shota Kageyama (景山将太) announced that he has left GAME FREAK and has become an independent artist. Shota Kageyama is best known for his work composing tracks for the games: Pokémon X and Y, Pokémon Black 2 and White 2, Pokémon Black and White and Pokémon HeartGold and SoulSilver.

Announcement Tweet

【ご挨拶】みなさま、明けましておめでとうございます。私事で恐縮ですが、2013年12月末日をもって、6年7ヶ月間お世話になった株式会社ゲームフリークを退職（卒業）し、本年1月から独立、新たに SPICA MUSICA（スピカムジカ）という音楽ブランドを立ち上げることとなりました。景山 将太 (@shotakageyama) January 1, 2014

Tweet Translation

[Greetings] Happy New Year, everyone. I'm sorry to discuss a personal matter, but I left (graduated) GAME FREAK, who have been good to me these past 6 years and 7 months, on December 31st to start a new independent music brand called SPICA MUSICA.

Source: https://twitter.com/shotakageyama/statuses/418409809700868097

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Source: http://www.pokemon.com/us/pokemon-news/news_socialmedia_announce-2012-09-24/