According to Yomiuri Newspaper, Kato Kazuhiko, the composer of “Do You Remember Love?” (theme song of Macross: Do You Remember Love?), committed suicide by hanging. He was 62 years old. He left a note in the hotel room.
Source: Yomiuri
Update
According to Sponichi news, he left two notes to his friends and the staff. In the notes, he confessed he couldn’t come up with new songs anymore due to the mental depression.
Source: Sponichi