Takehito Koyasu is a Japanese voice actor, narrator, and singer. Koyasu is known for his deep, smooth voice, which often lands him in roles that are either villains or sex icons bishōnen. Recently, though he has been voicing more and more lively/humorous characters. According to Hisaya Nakajo, the manga artist of the series Hana-Kimi, the character of Masao Himejima was designed with Koyasu's voice in mind. The voice actor ended up voicing this character in the series' drama CDs.