|This article is about a/an actor in Kamen Rider Decade.|
Masahiro Inoue (井上 正大 Inoue Masahiro) is a Japanese actor and martial artist (Tae Kwon Do practitioner) best known for his role as Tsukasa Kadoya, the eponymous rider of Kamen Rider Decade (2009), which later he reprised in Kamen Rider × Super Sentai: Super Hero Taisen (2012), Kamen Rider Wizard on episodes 52-53 (2013) and Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai (2014) and Kamen Rider Zi-O in episodes 13, 14, 15, 16, and other unspecified episodes. He reprised the role in the video game Kamen Rider: Battride War. 
Outside of Decade, he portrayed the villainous role of Jinga in Garo: Gold Storm - Sho from 2014 - 2018.
Inoue debuted as an actor in 2008, where he played Keigo Atobe in the Prince of Tennis musicals. One year later, he landed the lead role of Tsukasa in Kamen Rider Decade, where he would continue to play the role in several future crossovers of the character.
In 2015, Inoue starred as Jinga in Garo: Goldstorm, a fallen Makai Knight turned Horror. After Jinga's death in Goldstorm, the character was revived for the film Kami no Kiba, with Inoue reprising his role. As of 2018, Inoue stars as Jinga in a sequel series titled Kami no Kiba: Jinga.
Appearances as Tsukasa Kadoya
- Kamen Rider G (voice only as Decade)
- Kamen Rider Decade: all episodes
- Cho Kamen Rider Den-O & Decade Neo Generations: The Onigashima Warship
- Samurai Sentai Shinkenger: Act 21: The Father and Son Bears
- Kamen Rider Decade: All Riders vs. Dai-Shocker
- Kamen Rider × Kamen Rider W & Decade: Movie War 2010
- Kamen Rider × Super Sentai: Super Hero Taisen
- Kamen Rider Battride War
- Kamen Rider Wizard
- Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai
- Kamen Rider Zi-O
- Garo: Gold Storm - Sho - Jinga
- "Ride the Wind"
Masahiro Inoue had been recording "Ride the Wind" with Shuhei Naruse released on April 22, 2009. Prior to its appearance in the series, Inoue announced the song's on his blog and that he would record it under his character's name.
- As with Inoue's role as Jinga in Garo: Goldstorm - Sho, it would become a joke to say that he entered the "World of GARO" during talk shows. According to him, he signed a Decade KamenRide card for Garo director Keita Amamiya.
- In 2015, Inoue was among the fans whom played the arcade game Narerunda! Kamen Rider Drive, receiving a souvenir card depicting himself as Kamen Rider Drive.
- Inoue is a day older than Takeru Satoh.
- He announced his marriage to a Sailor Moon actress Jamie Natsuki on December 2016, with their first child was born in April 17, 2017.
- Inoue is also a skilled martial artist, trained in both taekwondo and Shorinji Kempo, and demonstrated his skills on the variety show VS ARASHI.
- He is first dan holder in taekwondo and he shows his skill in martial art in the film Taekwondo Damashii: Rebirth, in which he is one of the protagonists.
- Inoue can solve a Rubik's Cube in under 3 minutes, with his fastest record as 2 minutes and 22 seconds.
- ↑ https://www.instagram.com/p/BqlVZurlci6/
- ↑ http://www.jefusion.com/2013/03/masahiro-inoue-retrurns-as-kr-decade-in-kamen-rider-battride-war.html
- ↑ "初". http://ameblo.jp/shuheinaruse/entry-10221094450.html. Retrieved 2009-03-09.
- ↑ "Ride the wind". http://ameblo.jp/masahiro-inoue/entry-10220875165.html. Retrieved 2009-03-09.
- ↑ https://twitter.com/maaaaaaaasahiro/status/595118506611347457
- ↑ https://www.instagram.com/jaimie__official/
- ↑ http://www.iza.ne.jp/kiji/entertainments/photos/170417/ent17041718540030-p1.html