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Villains Wiki

Masahiro Nabeshima is a prison security guard with ties to Faust and an antagonist in Kamen Rider Build.

He was portrayed by Ichi Oomiya.


Masahiro Nabeshima was blackmailed into joining Faust, who threatened to kill his wife and daughter unless he obeyed them. He was used by Faust to inform Ryuga's girlfriend about a supposed job opportunity as Takumi Katsuragi's lab assistant as part of a scheme to frame Ryuga for Katsuragi's murder.

Nabeshima on the phone with Sento and Ryuga.

Nabeshima later kidnapped Ryuga after he was arrested for the alleged crime and brought him to Faust to be experimented on, but Ryuga escaped. He was later contacted by Ryuga, who demanded he confess and prove his innocence. Nabeshima then revealed that Faust was holding his family hostage and that he would testify in favor of him if he could rescue them. Unbeknownst to the Riders, however, Nabeshima was actually telling them that on the orders of Night Rogue in order to lure them to him.

After demanding Rogue free his family, Nabeshima was turned into the Mirage Smash and attacked Sento and a squad of Touto Guardians. He was fought off by Build and was defeated by him in his HawkGatling form. After being restored to his normal form, Nabeshima was abducted by Blood Stalk.

Nabeshima was then turned into a Smash again, this time the Square Smash. He was defeated and purified once again by Build but it was soon discovered that being exposed to Nebula Gas twice had caused him to lose most of his memories. However, Nabeshima later regained enough of his memories to inform Sento that the one who hired him into Faust and had him frame Ryuga Banjou was in fact Soichi Isurugi, shocking Sento.



Masahiro Nabeshima

Mirage Smash

Square Smash


           BUILD LOGO.png Villains

Night Rogue | Blood Stalk | Takumi Katsuragi | Nariaki Utsumi | Shingo Kuwata | Eita Kawai | Masahiro Nabeshima | Norio Matsui | Yoshikazu Takahashi | Shinobu Katsuragi | Faust Guardians

Yoshiko Tajimi | Blood Stalk | Kazumi Sawatari | Hokuto Three Crows | Akaba | Aoba | Kiba | Massugu Ubukata | Hokuto Guardians

Masakuni Mido | Kamen Rider Rogue | Fu Washio | Rai Washio | Seito Guardians | Hard Guardians

Namba Heavy Industries Ltd.
Juzaburo Namba | Nariaki Utsumi | Fu Washio | Rai Washio | Sawa Takigawa | Kaisei Mogami | Guardians | Hard Guardians

Blood Tribe
Killbus | Evolt | Kengo Ino | Ryoka Saiga | Mitsuomi Gohara

Needle Smash | Strong Smash | Burn Smash | Flying Smash | Press Smash | Ice Smash | Stretch Smash | Fang Smash

Simon Marcus | Keiji Uraga | Phantom Crushers | Guardians | Hard Guardians