is a Japanese actor and singer. His career has centered on television, in the genres of tokusatsu and jidaigeki.
Mitsugi was born on May 30, 1953, in Ichikawa, Chiba Prefecture. He graduated from Wakà  Gakuen High School.
He debuted in 1967 after being selected to portray the protagonist Azuma Hikaru in the television series Kà Âsoku Esper through 1967 to 1968. He starred in the 1973 series Shirojishi Kamen, and played a supporting role as the ninja Saizà  in Series III, Episodes 1âÂÂ57, of Abarenbà  Shà Âgun. He played a supporting role as ZAT team member Nishida in the Ultraman Taro series.
In NHK's eleventh Taiga drama, Kunitori Monogatari, Mitsugi portrayed Akechi Mitsuharu. He appeared regularly in Episodes 436âÂÂ509 of Tokusà  Saizensen.
A frequent guest actor, he made six appearances on à Âedo Sà Âsamà  and four on Zenigata Heiji, three on Taiyà  ni Hoero!', and two on Happyaku Yachà  Yume Nikki. Fans of the tokusatsu Chikyuu Sentai Fiveman know him as Dr. Hoshikawa. The producers of Abarenbà  Shà Âgun selected him to reprise his role in the 500th episode special, and again to portray the daimyà  Tokugawa Munenao in Series VI.
Outside drama series, his career includes other media and genres. In film, Mitsugi has three credits. He was a guest voice in an episode of the animated 1979 television show Takarajima. He has acted in stage productions in the 1970s, 1980s, and 1990s.
A vocalist, Mitsugi has released nine single recordings and one album.