圓谷製作
Born in 1967, Yagi grew up during the boom of tokusatsu television shows in Japan. In the mid-1990s, he joined Tsuburaya Productions, the creators of the popular Ultra Series, working as an Assistant Director on TV series such as Ultraman Tiga. He made his directorial debut on the fourth episode of the TV mini-series Moon Spiral in 1996. He continued to serve as both a Director and Director of Special Effects for the majority of Tsuburaya Productions' Ultra Series until 2007.