Masuda joined Johnny's Entertainment in November 1998. During his junior days, Masuda backdanced for many of his seniors in the agency, such as KAT-TUN, and participated in many Johnny's junior photoshoots. In 2001, he was cast as a junior high school student in the sixth season of the popular Japanese drama 3-nen B-gumi Kinpachi Sensei. In 2003, he landed the starring role in the drama special Musashi. He also performed with the junior group Kis-My-Ft.as the 'M' after Matsumoto Kohei's departure.
In late 2003, Masuda became a member of the J-pop group News to promote the Women's World Cup of Volleyball Championships. When News went on hiatus in 2006, he and fellow NEWS member Tegoshi Yuya formed the singing group Tegomass. The duo released the single "Miso Soup" in both Sweden and Japan. Masuda was allowed to further his acting experience in 2006 by landing various supporting roles in many Japanese dramas.
In late 2008, Masuda and the promoters of TU→YU formed a singing group to release the song "Soba Ni Iru Yo", which was featured in the product's commercials and released through the Japanese mobile phone network.
Masuda landed a role in the drama Rescue, which aired in January 2009.
In November 2009, Masuda acted in the stage play Ame no Hi no Mori no Naka (Inside a Rainy Day's Forest), with his first stage play leading role.
He is currently active in the group News as well as the subgroup Tegomass.
Variety shows
Ya-Ya-yah (2003–2007)
Soukon (2009–2010)
Hen Lab (2015-ongoing)
Shounen Club Premium (2016-ongoing)
Stage
MachiMasu
Ame no Hi no Mori no Naka (2009)
Hai iro no Kanaria (2012)
Strange Fruits (2013)
Commercials
Tu-Yu
Filmography
Actor
2023
Gifted (TV Series) as
Amakusa Natsuki
2023
Hold My Hand at Twilight (TV Series) as
Satoshi
- Episode #1.10 (2023) - Satoshi
- Episode #1.9 (2023) - Satoshi
- Episode #1.8 (2023) - Satoshi
- Episode #1.7 (2023) - Satoshi
- Episode #1.6 (2023) - Satoshi
- Episode #1.5 (2023) - Satoshi
- Episode #1.4 (2023) - Satoshi
- Episode #1.3 (2023) - Satoshi
- Episode #1.2 (2023) - Satoshi
2022
Old Rookie (TV Series) as
Sota Umeyashiki
- Episode #1.10 (2022) - Sota Umeyashiki
- Episode #1.9 (2022) - Sota Umeyashiki
- Episode #1.8 (2022) - Sota Umeyashiki
- Episode #1.7 (2022) - Sota Umeyashiki
- Episode #1.6 (2022) - Sota Umeyashiki
- Episode #1.5 (2022) - Sota Umeyashiki
- Episode #1.4 (2022) - Sota Umeyashiki
- Episode #1.3 (2022) - Sota Umeyashiki
- Episode #1.2 (2022) - Sota Umeyashiki
- Episode #1.1 (2022) - Sota Umeyashiki
2022
Kichijoji Losers (TV Series) as
Satoshi Abiko
- Boku-tachi ni uso wa nai (2022) - Satoshi Abiko
- Mai independensu dei (2022) - Satoshi Abiko
- Nisemono no ko (2022) - Satoshi Abiko
- Joshikôsei wa nido beru wo narasu? (2022) - Satoshi Abiko
- Dôsôkai (2022) - Satoshi Abiko
- Boku-tachi wa furenzu janai (2022) - Satoshi Abiko
2019
Voice: Emergency Control Room 110 (TV Series) as
Toru Ishikawa
2021
Komi-san wa, Komyusho desu (TV Series) as
Tadano Hitohito
- Episode #1.1 (2021) - Tadano Hitohito
2020
People Who Do Not Rent (TV Series) as
Shota Moriyama
2020
Pareto's Miscalculation (TV Series) as
Junichi Onodera
- Episode #1.5 (2020) - Junichi Onodera
- Episode #1.4 (2020) - Junichi Onodera
- Episode #1.3 (2020) - Junichi Onodera
- Episode #1.2 (2020) - Junichi Onodera
- Episode #1.1 (2020) - Junichi Onodera
2018
Zero: The Bravest Money Game (TV Mini Series) as
Kazuya Yamaguchi
- Episode #1.10 (2018) - Kazuya Yamaguchi
- Episode #1.9 (2018) - Kazuya Yamaguchi
- Episode #1.8 (2018) - Kazuya Yamaguchi
- Episode #1.7 (2018) - Kazuya Yamaguchi
- Episode #1.6 (2018) - Kazuya Yamaguchi
- Episode #1.5 (2018) - Kazuya Yamaguchi
- Episode #1.4 (2018) - Kazuya Yamaguchi
- Episode #1.3 (2018) - Kazuya Yamaguchi
- Episode #1.2 (2018) - Kazuya Yamaguchi
- Episode #1.1 (2018) - Kazuya Yamaguchi
2015
News: Yonjuushi (Music Video)
2015
Okaasan ore wa daijoubu (TV Movie) as
Elder Son
2014
The Files of Young Kindaichi Neo (TV Mini Series)
- Episode #1.4 (2014)
- Episode #1.3 (2014)
2012
Resident - gonin no kenshûi (TV Mini Series) as
Junichi manaka / Junichi Manaka
- Episode #1.5 (2012) - Junichi manaka
- Episode #1.4 (2012) - Junichi manaka
- Episode #1.3 (2012) - Junichi Manaka
- Episode #1.2 (2012) - Junichi manaka
- Episode #1.1 (2012) - Junichi manaka
2011
3-nen B-gumi Kinpachi sensei: Final (TV Movie)
2010
Dolittle the Veterinary Physician (TV Mini Series) as
