|This article is about a/an actor in Kamen Rider Decade.|
|Born||March 20, 1989|
|Born in||Kanagawa Prefecture, Japan|
|Kamen Rider Decade|
|Portraying Tsukasa Kadoya in Kamen Rider Decade (2009).|
|Portraying Tsukasa Kadoya in Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai (2014).|
Masahiro Inoue (井上 正大 Inoue Masahiro) is a Japanese actor and martial artist (Tae Kwon Do practitioner).
He is 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). He reprised the role in the video game Kamen Rider: Battride War. 
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
- 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.
- In hindsight-based humor, Inoue would later on portray Miyamoto Musashi as part of the TV Drama The Greats in the Next Room (偉人の来る部屋 Ijin no Kuru Heya, please set "en" to "ja" in the URL) in 2009, and less than 7 years later, a new Kamen Rider has a form dedicated to Miyamoto Musashi.
- 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.
- Inoue is a day older than Takeru Satoh.
- He announced his marriage to actress Jamie Natsuki on December 2016, with their first child coming in the spring of 2017.