Career
Igarashi was affiliated with the acting unit Doctorate-BOYS, produced by Watanabe Entertainment. Igarashi started his entertainment career auditioning for Doctorate-BOYS in the group"s first open audition, held on July 27, 2004. In early 2006, Igarashi conquered his first lead role as Mirai Hibino/Ultraman Mebius in the tokusatsu series Ultraman Mebius, the 40th anniversary production in the Ultraman series.
He was chosen for the role for being able to convey the part of a "rookie" hero well, being at the time a new actor with little experience in demanding lead roles himself.
Igarashi was so fond of his work in the series that he eventually incorporated the Möbius strip sign "∞" to his autograph. With the end of Mebius in March 2007, Igarashi turned his focus to television series and invested on broadening his work.
The heroic Mirai of Mebius was followed by diverse characters such as the young psychopath Otoya in the adult drama Watashitachi no Kyokasho, the naive otaku Shinji in the teenage comedy Hana-Kimi and the lively street musician Mitsuru in the late night suspense Shigeshoshi, allowing Igarashi to develop his acting through various genres and different character types. June 2007 marked Igarashi"s theatre debut, guest-starring in the musical Doctorate-BOYS STAGE Volume 1: Kanbai Onrei, a Doctorate-BOYS project featuring all group members, in the same manner of the 2006 drama/documentary series Doctor of Divinity-BOYS. In 2008 he will again guest star in Doctorate-BOYS STAGE Volume 2: Last Game.
In October 2007 came Igarashi"s radio debut with Doctorate-RADIO BOYS, another Doctorate-BOYS project
Igarashi hosts the weekly show with Shigeshoshi co-star Masato Wada, featuring guest Doctorate-BOYS members in each show. After the successful release of Doctorate*Date"s 2013 single "Glory Days", Igarashi Shunji declared his retirement by the end of November,2013 from the Entertainment Industry in one of the D8Date live performances. At the beginning of November, this announcement was officially introduced in the Doctorate-Boys official page.
Radio Doctorate-RADIO BOYS (2007–present, Bay FM) Igarashi has been featured in the following promotional releases: CDs Ultraman Mebius/Run through! -CREW GUYS- - Project DMM with Ultra Bouei-tai (Ultraman Mebius) Photobooks Doctorate-BOYS: Doctorate-BOYS (2005/04, X) Doctorate-BOYS: Strategic Arms Reduction Talks! (2006/03, ) mirai (2006/09, ) - solo photobook Hanazakari no Kimi Tachi e - Ikemen Paradise Making Book (2007/09, ).