Icon-zero-one.png This article is about a/an event in Kamen Rider Zero-One .

The Daybreak Town Accident (デイブレイクタウン事故 Deibureikutaun Jiko) was an incident that involved a massive explosion in a Humagear manufacturing factory caused by Satoshi Sakurai, destroying the Humagear operation test city on December[1] 2nd, 2007, approximately 12 years before Aruto Hiden inherited Hiden Intelligence.

Despite incredible collateral damage and extensive casualties, culminating in the decimation of the entire town, the entire incident had been strictly regarded as an accident. Isamu Fuwa, a former captain of A.I.M.S. and alleged survivor of the incident himself, instead saw it as a siege by rogue Humagears before his memories were revealed to be fake. Is AI The Enemy? The Ally?


The Satellite being prepped for launch

The city was part of a developmental project where the Japanese government planned on creating Daybreak Town for the purpose of implementing Humagears into everyday technology. They consulted several technology companies such as Hiden Intelligence and ZAIA Enterprise to create the Ark, a special satellite made specifically for the Humagears in Daybreak Town.

Humagears attack in Daybreak office.

As part of their crusade against humanity, the terrorist organization MetsubouJinrai.net invaded the area where the Humagears were being produced and corrupted them, letting them run rampant. The Humagears then proceed to hunt any human inside Daybreak Town. In his fabricated memories, Isamu Fuwa was one of the survivors. Is AI The Enemy? The Ally?

Eventually, they reached the nuclear reactors and caused them to go unstable, resulting in an imminent explosion. The head-factory man, Satoshi Sakurai had finished evacuating all the human workers out of the facility and locked it down to prevent the Humagears from leaving, and also minimalizing the causalities. In the end, the explosion had destroyed the entirely of Daybreak Town and killed Sakurai. I Saw The Bus Guide! Anna's Truth

The young Aruto Hiden mourning his father's shutdown

While the majority of the Humagears present that day went berserk, there were some, such as Aruto's parental Humagear Soreo Hiden, that did not experience such malfunction. Consequently, Soreo was destroyed protecting his son from an explosion. I am the President and a Kamen Rider

In this incident, a number of Progrisekeys were lost, which are later thought to have reappeared in the hands of Hiden Intelligence. That Man, Sushi Chef

Beside of the Humagear-related incident, an experimental AI-loaded medical nano-machine developed by MIRAI Company is also affected, which causes Akane Tono's death.Kamen Rider Zero-One: REAL×TIME


The barrier

The town was completely destroyed, with the ruins of buildings became half-submerged and the whole town became walled even after 12 years.

The destroyed town became the base of operation for MetsubouJinrai.net, who is using data obtained from defeated rogue Humagears to restore an object called the Ark, which is currently submerged in the town.

The incident was later covered up by Hiden Intelligence, citing faulty maintenance to be the cause of the incident, with no information able to found on the incident in the Hiden Intelligence Database, and any employee, such as Jun Fukuzoe, kept the truth of the incident hidden from public knowledge, feigning ignorance about what happened.

Twelve years after the incident, a press conference was held that revealed new revelations regarding the incident, showing MetsubouJinrai.net's involvement.

It was eventually revealed that Gai Amatsu was responsible for the Daybreak Town incident and the Ark's malice.What Do Humagears Dream Of?

History Alteration

The creation of Another Zero-One by the Time Jacker Finis caused these events to be erased from history resulting in the premature death of Korenosuke Hiden and a Humagear takeover of Hiden Intelligence. This ended up leading humanity to the verge of extinction with Izu being the only known Humagear on humanity's side. Kamen Rider: Reiwa The First Generation

Known Individuals Involved

Known Survivors
Known Victims
Known Perpetrators


  1. Month can be seen in a sign in Reiwa: The First Generation
  2. Initially alleged to be; revealed to be false.Are Dreams Important to You?
  3. Allegedly resisted the MetsubouJinrai.net hacking, but was revealed to be an undercover agent for them instead.We are the Astronaut Brothers!


Icon-zero-one.png Kamen Rider Zero-One
Kamen Riders
Soreo Hiden - Aruto Hiden - Isamu Fuwa - Yua Yaiba - Jin - Horobi - Ikazuchi - Naki - Gai Amatsu - Ark - Rihito Isshiki
Movie-exclusive: Soreo Hiden - S - Bell - Kamen Rider Abaddon - Izu - Leon Arkland - Kamen Rider MetsubouJinrai (Jin, Horobi, Ikazuchi & Naki)
Stageshow-exclusive: Azu - Little Assassin
Hiden Zero-One Driver - A.I.M.S. Shotriser - MetsubouJinrai Forceriser - Zetsumeriser - ZAIA Thousandriver - Cycloneriser - Raidriser - ZAIA Slashriser - Ark Driver - Hiden Zero-Two Driver - Zetsumetsu Driver - Eden Driver - Abaddoriser - MetsubouJinrai Driver
Progrisekeys - Progrise Holder - Progrisekey Connector - Hiden Risephone - Rider Models
Attache Calibur - Attache Shotgun - Attache Arrow - Breaking Mammoth - Giger - Buaruku Sabers - Authorise Buster - Assault Grip - Thousand Jacker - Progrise Hopper Blade - ZAIA Spec - Knuckle Demolition - Nihon Ookaminotsume - Claw Assault - Horobi's Katana
Hiden Intelligence: Korenosuke Hiden - Soreo Hiden - Jun Fukuzoe - Sanzo Yamashita
Humagears: Izu - Shesta - Soreo Hiden - Wazu Nazotoku - Subaru - Hakase Bot - Fukkinhoukai Jiro
Legend Riders: Sougo Tokiwa - Geiz Myokoin - Woz - Tsukuyomi
Humans: Norio Uozumi - Go Sakurai - Satoshi Sakurai - Choichiro Ishizumi - Seiji Tazawa - Satō - Yuta Yomura - Isao - Shinya Owada - Ikkei Amatsu
Humagears: Mageana - Ikkan Nigiro - Anna - Mashirochan - Dr. Omigoto - Z #5 - Delmo - Love-chan - Midori
A.I.s: Zea - Zat - Ai-chan - Thouser
Ark - Horobi - Naki - Jin - Ikazuchi - Little Assassin - Azu
Monsters: Berotha Magia - Kuehne Magia - Ekal Magia - Neohi Magia - Onycho Magia - Vicarya Magia - Gaeru Magia - Mammoth Magia - Dodo Magia - Arsino Magia
Footsoldiers: Trilobite Magia - Dodo Magia Chick - Battle Magia
Other Villains:
Finis - Will
Gai Amatsu - Williamson Yotagaki
ZAIA Spec Representatives: Rentaro Tachibana - Tatsumi Arayashiki - Naoto Ichimori - Takeshi Homura - Masamitsu Yuto
Other: Daiki Kyogoku - Makio Nodachi
A.I.M.S.: Isamu Fuwa - Yua Yaiba - Naki - Eida - Ono - Degawa - Shida - Eifuku - Ito
Monsters: Crushing Buffalo Raider - Splashing Whale Raider - Dynamaiting Lion Raider - Storming Penguin Raider - Scouting Panda Raider - Fighting Jackal Raider
Footsoldiers: Invading Horseshoe Crab Raiders
Leon Arkland - Sold9 - Sold20 - Sold404
Monsters: Dire Wolf Sold Magia - Serval Tiger Sold Magia - Crushing Buffalo Sold Magia - Splashing Whale Sold Magia - Storming Penguin Sold Magia - Scouting Panda Sold Magia - Invading Horseshoe Crab Sold Magia
Footsoldiers: Solds
S - Bell - Buga - Moore - Lugo
Footsoldiers: Kamen Rider Abaddon
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