Hitoshi Yasui (a.k.a chair house) was born in Tokyo, Japan in 1955.

He began his creative career in the early 1990s as a multimedia artist utilizing a macintosh SE/30 + Full Color Board (according to his personal website). Since retiring, he has been active in both digital art and music. One of his most known musical project is the "Piano Ten Thousand Leaves" project, of which he is the leader and contributes to by composing a piece every day.

"Piano Ten Thousand Leaves" aims to compile 4,536 original melodies, which is the same amount as the original "Ten Thousand Leaves" (万葉集), an 8th century anthology of Japanese poetry. Hitoshi composes an original short piano music every day for this, which people have called "natural piano improvisational music creation". According to their official website, he reached the halfway milestone of 2286 songs after six years since project initiation, in February 2020. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.