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"Everything for Namba Heavy Industries!"
―The company's motto.[src]

Namba Heavy Industries Ltd. (難波重工 Nanbajūkō)[1] was a weapons manufacturing company in Kamen Rider Build.

Company Members

Company building.

  • Juzaburo Namba (CEO, deceased in the previous world, presumably revived in the New World)
  • Nariaki Utsumi (Second Night Rogue/Hell Bro's/Kamen Rider MadRogue, defected to Evolto's side, later joins with Team Build in the New World)
  • Masuzawa (Deceased)

Namba Children


  • Faust
    • Takumi Katsuragi (Former, Founder of Faust, Kamen Rider Build, and creator of the Rider System, the Transteam System and the experiments involving Nebula Gas. His murder was faked and his memories erased by Soichi Isurugi after he found his true identity as Evolto and his true intentions, lived under the identity of Sento Kiryu until the merging of the New World, creating a separate identity of himself from Sento).
    • Gentoku Himuro (Former, Night Rogue, Kamen Rider Rogue, Leader of Faust and Former Acting Prime Minister of Touto, defected to Seito after being exposed and exiled, returned to his old personality after becoming Kamen Rider Rogue).
    • Evolto (Current Leader of Faust, Blood Stalk, Kamen Rider Evol, replacing Gentoku Himuro as new partner, later betrayed when the latter revealed his true intention)
  • Shinobu Katsuragi (Scientist/Supplier of Lost Fullbottles)



Led by Juzaburo Namba, Namba Heavy Industries Ltd. operated for many decades prior to the Sky Wall Disaster. Over the years, Namba took in numerous orphans such as Nariaki Utsumi, Sawa Takigawa, and brothers Fu and Rai Washio. While this act was ostensibly benevolent, these youths were raised to pledge allegiance to Namba Heavy Industries, becoming the "Namba Children".

In the wake of the Sky Wall Disaster of 2008, which saw the eponymous Sky Wall split Japan into what would become three separate nations: Touto, Hokuto, and Seito, Namba Heavy Industries manufactured an army of robotic Guardians which were provided to compliment the peace-keeping forces of the Japanese nations, with even the pacifistic Touto adopting them by 2013.

In the last days before the Japanese Civil War, Kiryu Sento and Banjou Ryuga entered a closed off Namba labratory in order to retrieve the research data buried by Katsuragi Takumi before getting into a fight between Night Rogue and Blood Stalk.


Secretly, Namba gave his support to Prime Minister Masakuni Mido of Seito, his preferred choice to inherit Japan to whom he would spare all expenses to support. Taking advantage of Hokuto's advance into Touto, the initially neutral Seito quickly seized the vulnerable Hokuto before declaring war on Touto. Working on Namba's behalf, Nariaki Utsumi updated the Kaiser System originally developed by Kaisei Mogami to create Remocon and Engine Bro's, soldiers of Seito alongside Rogue, a new Rider system used by Gentoku Himuro. The Phantom of the West

After the deaths of both Washio brothers and Namba, Utsumi and most of Namba's remaining scientists start working for Evolto.

The New World

The Namba Machine Workshop.

Namba Heavy Industries was erased from reality following the merger of the World of Kamen Rider and the World of Build. In its place is a small factory called the Namba Machine Workshop (難波機械製作所 Nanba Kikai Seisakusho), which manufactures steel products for commercial non-military use such as medical equipment like canes and walkers for the elderly. Nariaki Utsumi works as a flustered employee there and is shown to have comically injured himself upon being upset at the craftsmanship of his work.



  • The company's methods of training children to become scientists, soldiers, and spies who swear absolute loyalty to its leader brings to mind the revelation of Yggdrasill Corporation's dark secrets in Gaim Gaiden: Kamen Rider Zangetsu, where children at a very young age were trained to become workers of said company.
    • This method is also somewhat similar to the Hitler Youth program during World War II, training children to become soldiers to fight faithfully for Nazi Germany.
  • Sawa said that if Namba Children spies are compromised in their field, they are to commit suicide. In most military and espionage organizations, agents in danger of being captured are provided cyanide suicide pills, which can be ingested to avoid imminent torture and ensure they cannot be interrogated to the point of disclosing confidential information. This could be a possible suicide option Namba has given the children, however it is not confirmed.
  • Following the naming scheme of the other nations, Namba takes its name from Nan ( Nan) meaning south.



Icon-build.png Kamen Rider Build
Kamen Riders
Sento Kiryu (Takumi Katsuragi) - Ryuga Banjo - Kazumi Sawatari - Gentoku Himuro - Evolto - Nariaki Utsumi - Shinobu Katsuragi
Movie-exclusive: Kengo Ino - Killbus - Keiji Uraga
Drivers/Transformation Gear
Build Driver - Transteam Gun - Nebulasteam Gun - Sclash Driver - Evol-Driver
Transformation Devices
Fullbottles - (Great) Cross-Z Dragon - Sclashjellies - Hazard Trigger - Cross-Z Magma Knuckle - Evol-Trigger - Grease Blizzard Knuckle - Killbuspider - Grease Perfect Kingdom
Drill Crusher - Hawk Gatlinger - 4Koma Ninpoutou - Kaizoku Hassyar - Fullbottle Buster - Steam Blade - Beat Closer - Twin Breaker - Muscle Glove - Solstall Wings - Giant Scratcher - Space Ride Arm - Spine Knuckle - Long Range Cleaner - Trash Converter - Gold Lio Gauntlet - Multi Deluge Gun
Pandora Box - Halfbodies - Fullbottle Holder - Build Phone
Vortex Finish - Hazard Level - Project Build - Sky Wall - Nebula Gas
nascita: Misora Isurugi - Soichi Isurugi - Sawa Takigawa - Kazumi Sawatari - Gentoku Himuro
Kamen Riders: Eiji Hino - Gentaro Kisaragi - Kouta Kazuraba - Takeru Tenkuji - Emu Hojo - Hiiro Kagami - Taiga Hanaya - Kiriya Kujo - Kuroto Dan - Parado - Sougo Tokiwa - Geiz Myokoin - Tsukuyomi
Prime Ministers: Taizan Himuro (Touto) - Yoshiko Tajimi (Hokuto) - Masakuni Mido (Seito)
Namba Heavy Industries Ltd.: Juzaburo Namba - Nariaki Utsumi - Haruhiko Wanibuchi - Guardian
Hell Bro's: Fu Washio - Rai Washio - Yoshikazu Takahashi - Norio Matsui
Aliens: Vernage
Gentoku Himuro - Evolto - Nariaki Utsumi - Takumi Katsuragi - Shingo Kuwata - Eita Kawai - Yoshikazu Takahashi - Norio Matsui
Normal Smash: Fang Smash - Needle Smash - Strong Smash - Burn Smash - Flying Smash - Mirage Smash - Square Smash - Press Smash - Ice Smash - Stretch Smash
Empowered Smash: Strong Smash Hazard - Press Smash Hazard - Stretch Smash Hazard - Flying Smash Hazard
Hard/Hazard Smash: Castle Hard/Hazard Smash - Stag Hard/Hazard Smash - Owl Hard/Hazard Smash
Clone Smash: Press Clone Smash - Stretch Clone Smash - Strong Clone Smash - Flying Clone Smash
Lost Smash: Owl Lost Smash - Stag Lost Smash - Castle Lost Smash - CD Lost Smash - Scissors Lost Smash - Zebra Lost Smash
Foundation X
Kaisers: Kaisei Mogami (World of Build, World of Ex-Aid) - Nebula Bugster
Blood Tribe
Kengo Ino - Ryoka Saiga - Mitsuomi Gobara - Evolto - Killbus - Akaba (imitation) - Aoba (imitation) - Kiba (imitation) - Remocon Bro's (imitation) - Engine Bro's (imitation)
Down Fall
Keiji Uraga - Simon Marcus (Phantom Crusher)

All items (13)