World of Build

The , alternatively referred to as World A, was an A.R. World home to Sento Kiryu and the reality which Kamen Rider Build takes place. This world has a rich history in science, particularly in the country of Japan where many notable individuals have connections with the Touto Institute of Advanced Matter Physics. However, it was invaded by an alien named Evolto who was instrumental in causing multiple unprecedented events to happen, such as the Sky Wall Disaster and the Japanese Civil War. As such, his actions prompted the creation of this world's native Kamen Rider, Build as well as his allies. 
However, when Evolto ultimately made the decision to destroy the world, his plans were foiled by Build, who ultimately merged their Earth with World B, one whose history did not involve the Sky Wall, and the resulting would was dubbed the . All universal counterparts were merged, except for Sento and Ryuga, who became their own entities after Evolto had biologically altered them. They do not have any of their memories from the war, but they can be restored through means such as the re-activation of the Pandora Box.
==History==
==Inhabitants==
===Humans===
*Takumi Katsuragi (Later has the another version of Takumi Katsuragi in the New World)
**Sento Kiryu
*Kazumi Sawatari (Deceased, Revived in the New World)
*Misora Isurugi
*Soichi Isurugi
*Sawa Takigawa
*Gentoku Himuro (Deceased, Revived in the New World)
*Taizan Himuro (Deceased, Revived in the New World)
*Nariaki Utsumi (Deceased, Revived in the New World)
*Shingo Kuwata (Deceased, Presumably revived in the New World)
*Eita Kawai
*Yui Mabuchi (Deceased, Revived in the New World)
*Masahiro Nabeshima
*Tomoe Nabeshima
*Haruka Nabeshima
*Juzaburo Namba (Deceased, Presumably revived in the New World)
*Yoshiko Tajimi
*Masakuni Mido (Deceased, Revived in the New World)
*Kaisei Mogami (Deceased, Merged with his World of Kamen Rider counterpart and was destroyed with him prior to the creation of the New World)
*Akaba (Deceased, Revived in the New World)
*Aoba (Deceased, Revived in the New World)
*Kiba (Deceased, Revived in the New World)
*Fu Washio (Deceased, Presumably revived in the New World)
*Rai Washio (Deceased, Presumably revived in the New World)
*Masuzawa (Deceased, Presumably revived in the New World)
*Kyoichi Shimizu (Deceased, Presumably revived in the New World)
*Kasumi Ogura (Deceased, Revived in the New World)
*Reika Kine
*Tatsuya Kishida
*Taro Satou (Deceased, Revived in the New World)
*Takehiko
*Shinobu Katsuragi (Deceased, Revived in the New World)
*Kyoka Katsuragi
*Massugu Ubukata
*Koji Hotei (Deceased, Presumably revived in the New World)
*Yuri Banjo (Deceased, Presumably revived in the New World)
*Keiji Uraga (Deceased, both in the original world and in the New World)
===Other===
*Vernage (Deceased)
*Evolto
*Ryuga Banjo (Later has a purely human counterpart existing in the New World alongside himself)
*Parado (From the World of Ex-Aid, formerly)
*Kengo Ino (Deceased, human host presumably revived in the New World)
*Mitsuomi Gobara (Deceased, human host presumably revived in the New World)
*Ryoka Saiga (Deceased, human host presumably revived in the New World)
*Killbus (Deceased)
==Locations==
*Earth
**Japan
***Touto
****nascita
****Barber Kiryu
***Hokuto
****Sawatari Farm
***Seito
*Mars
*Moon (Destroyed, Restored in New World)
*Planet Blood
==Organizations==
*Institute of Space Engineering Technology
*Namba Heavy Industries Ltd.
*Faust
*Touto Institute of Advanced Matter Physics
==Technology==
===Devices===
*Pandora Box
**Sky Wall
*Evol-Driver
*Evolbottles
*Evol Trigger
*Prominence
*Nebulasteam Gun
*Gears
*Transteam Gun
*Build Driver
*Fullbottles
*Sclash Driver
*Sclashjellies
*Hazard Trigger
===Transformations===
*Rider Systems
**Kamen Rider Build
**Kamen Rider Cross-Z
***Kamen Rider Cross-Z Charge
***Kamen Rider Cross-Z Magma
***Kamen Rider Great Cross-Z
**Kamen Rider Grease
**Kamen Rider Rogue
**Kamen Rider Evol
**Kamen Rider MadRogue
*Transteam System
**Night Rogue
**Blood Stalk
*Kaiser Systems
**Bikaiser
***L Kaiser
***R Kaiser
**Nebula Hell Bro's
**Hell Bro's
***Engine Bro's
***Remocon Bro's
*Smash
**Fang Smash
**Needle Smash
**Strong Smash
***Strong Smash Hazard
**Burn Smash
**Flying Smash
***Flying Smash Hazard
**Mirage Smash
**Square Smash
**Press Smash
***Press Smash Hazard
**Ice Smash
**Stretch Smash
***Stretch Smash Hazard
*Lost Smash
**Owl Lost Smash
**Stag Lost Smash
**CD Lost Smash
**Scissors Lost Smash
**Zebra Lost Smash
===Constructs===
*Clone Hell Bro's
*Clone Smash
**Press Clone Smash
**Stretch Clone Smash
**Strong Clone Smash
**Flying Clone Smash
*Guardians
**Hard Guardians
==Behind the scenes==
As established from the first episode, the Sky Wall Disaster of ten years prior had extreme effects on Japan which were not present in prior Kamen Rider Series. Ultimately, the film Kamen Rider Heisei Generations Final: Build & Ex-Aid with Legend Riders confirmed that Kamen Rider Build took place in its own world separate from the World of Ex-Aid, home to Ex-Aid as well as the various Legend Riders such as Ghost, Gaim, Fourze and OOO.
The development of creating the New World was conceived by main writer Shogo Muto. The original plan was for the heroes to endure several sacrifices during the battle against Evolto, leading to the recreation of Build's world. However, that ending was changed to intergrate Build with the rest of the Kamen Riders in preparation for Kamen Rider Zi-O.『仮面ライダービルド超全集』小学館〈てれびくんデラックス愛蔵版〉、2018年12月25日。ISBN 978-4-09-105162-2。『OFFICIAL PERFECT BOOK BUILD BEST MATCH CREATION [仮面ライダービルド 公式完全読本]』ホビージャパン〈公式完全読本シリーズ〉、2018年12月25日。ISBN 978-4-7986-1837-1。
==Notes==
*This is the first confirmed and explored A.R. World in the Heisei Phase 2 era.
**Although an alternate version of Sokichi Narumi appeared at the end of Kamen Rider × Kamen Rider W & Decade: Movie War 2010, his world was never explored.
*In the South Korean dub of Kamen Rider Build, the country was changed from Japan to a fictitious country due to political reasons.
==Appearances==
Category:A.R. Worlds