Breath by Breath is an a cappella 'chorus unit' formed by professional vocalists Kiyoshi Hiyama, Yasuhiro Kido, Junko Hirotani, Naoki Takao and Makoto Matsushita, who have been supporting top Japanese artists for a long time. Their first album, "Breath by Breath" was released by Crown record.

"New Asia" is a compilation album released by Toshiba EMI on March 27. Yasuhiro Kido and Junko Hirotani's unit, Kira's song, "Sakura" is included on this album. Price : 2,800 yen (including tax).

"Kira" is a unit formed by Yasuhiro Kido and Junko Hirotani, and their first album was released on Jun 26, 2002 by Toshiba EMI! "Kira" is a little bit different from "Breath by Breath". This album's concepts are "flowers" and "beautiful Japanese words and spirits", and all songs included on this album are original.

Breath by Breath's a cappella album of Japanese nursery rhymes was released by Colombia records on August 21, 2002.