手紙 〜拝啓 十五の君へ〜 by アンジェラ・アキ

"Tegami (Haikei Jūgo no Kimi e)" (手紙 ～拝啓 十五の君へ～, "Letter: Greetings to a 15 Year Old") is the eighth Japanese single by Angela Aki and was released on September 17, 2008. It was broadcast in a music program Minna no Uta in August 2008 with some re-runs. The song reached number three on the Oricon Weekly Charts, selling more than 200,000 copies. It was certified Million for downloads in 2016 by the RIAJ. The song is performed in the anime movie Colorful. The song was ranked at 25 on "Billboard Japan Hot 100 Songs" chart.The B-side "Still Fighting It" is a Japanese language cover of Ben Folds' song of the same name. Aki herself wrote the Japanese version's lyrics. Folds himself, by chance, heard Aki cover the song at the 2008 Fuji Rock Festival. He was impressed, and met with Aki. Due to this, they collaborated on the song "Black Glasses", on Aki's next album, Answer.