Started out as an actor, appearing in Yaguchi Shinobu’s Waterboys (2001) before becoming a director of behind-the-scenes documentaries, music videos and commercials. He completed Pyuupiru (2010), an 8-year-in-the-making documentary about the gender-identity-conflicted artist, Pyuupiru. The film was screened at International Film Festival Rotterdam 2011 and Jeonju International Film Festival 2010. His first feature film PIETA IN THE TOILET (2015), featuring RADWIMPS’ vocalist Noda Yojiro, was a nationwide hit. The film garnered Matsunaga numerous awards as well as being screened in competition at Jeonju International Film Festival 2015. It was also selected for International Film Festival Rotterdam 2016. Vibration: THE YELLOW MONKEY (2017), a documentary on legendary rock band THE YELLOW MONKEY filmed throughout 2016, screened at Busan International Film Festival 2017. He has been selected to take part as one of Asia’s bright new directors for the second collection of films produced through the Japan foundation, Tokyo International Film Festival's Asian Three-fold Mirror project in 2018. His latest film is HANALEI BAY (2018), which is based on the story by Murakami Haruki.