This article is about a/an movie-exclusive villain in Kamen Rider W.

Hiroshi Sagami (相模 広志 Sagami Hiroshi) was a police captain and main antagonist of Kamen Rider Accel's part of Kamen Rider W Returns as the Commander Dopant (コマンダー・ドーパント Komandā Dōpanto), the leader of the One Dopant Army.


At first glance appears to be a friendly and reasonable policeman; but this was just a facade he puts up to conceal his identity as the Commander Dopant. He really has the psychotic belief that criminals are just "trash" with no salvation and the only way to save them is through death, to the extant of becoming a Dopant. He was willing to frame and even kill fellow policemen who get in the way of his beliefs.


Two years prior to the events of W Returns, Sagami was out with his wife on their anniversary giving her a ring until she was shot by a criminal Sagami had arrested. In order to get rid of the "trash" that courts couldn't handle, Sagami purchased the Commander Gaia Memory. When he chased Aoi Katsuragi and her father after the latter had done pickpocketing scheme, Aoi's father attempted to give himself up to Sagami, but Sagami transformed into the Commander Dopant and killed him.

Sagami reappeared after Ryu Terui was called for an investigation about a syndicate of pickpockets. When Ryu found Aoi, Sagami as the Commander Dopant had his Kamen Soldiers attack and placed a bomb on Aoi which would detonate in two hours if she did not bring him the Gaia Memory Enhancement Adapter she stole from him and frames Ryu for attacking Mikio Jinno by shooting him in the stomach. When the device was recovered, Sagami had his partner, Yukihiro Ohno, distract him while he took Aoi and the adapter.

Ryu used a bus to stop the car they were in and cornered them. Sagami explained his reasons and returned Ryu's Accel Memory Aoi stole from him to kill her. Shotaro Hidari and Philip then interfere, transforming into Kamen Rider Double to fight the Masked Soldiers. Ryu transforms into Kamen Rider Accel to fight the Commander Dopant who initially overpowers him until becoming AccelTrial, disarming the detonator. But the Dopant uses the adapter and becomes stronger defeating Accel.

He then abducts Akiko to convince Ryu on becoming an "executioner" by making him remember the loss of his family by kidnapping Akiko, who had been chasing Ryu while this was all going on for thinking Ryu was being unfaithful to their marriage. But when Ryu arrives he tells Sagami that he let go of the past and his feelings of vengeance to become a Kamen Rider who protects Futo City, an incensed Sagami becomes the Commander Dopant to blow up the platform Akiko is on, but Aoi steal the adapter and throws it to Ryu, making him become AccelBooster and defeats the Commander Dopant with the Booster Slash Maximum Drive. Sagami is then arrested for his crimes.


Commamder Dopant

Commander Dopant

―Transformation announcement[src]
  • Height: 230 cm
  • Weight: 200 kg

As the Commander Dopant, Sagami, with the touch of a button on his left arm, can create Masked Soldiers resembling a SWAT team armed with rods that can give off electricity, and delete people like data. He is also armed with missiles and a timed bomb which can be stopped by deactivating the detonator.

Commamder Dopant Upgrade

Commander Dopant (Empowered)

"Commander Upgrade!"
―Transformation announcement[src]
  • Height: 285 cm
  • Weight: 250 kg

When using the Gaia Memory Enhancement Adapter, the Commander Dopant becomes more powerful with additional armor on his chest with a cogwheel sticking out from the back. In this form, the Masked Soldiers become more powerful and the Dopant can fire more missiles at once.

Narumi Detective Agency
Shotaro Hidari - Philip - Akiko Narumi - Sokichi Narumi† - Tokime
Double Driver - Accel Driver - Lost Driver - Gaia Memories - Memory Gadgets - Fang Memory - Xtreme Memory - Trial Memory - Gaia Memory Enhancing Adapter - Metal Shaft - Trigger Magnum - Engine Blade - Skull Magnum - Prism Bicker - Eternal Edge - RevolGarry - HardBoilder - Gunner A - Shroud Magnum - SkullBoilder - SkullGarry
The Fuuto Irregulars
Santa-chan - Watcherman- Queen & Elizabeth - Isamu Bito
Futo Police Department
Ryu Terui - Mikio Jinno - Shun Makura
Museum and the Dopants
Foundation X
The Sonozaki Family: Terror - Claydoll - Taboo/R Nasca - Nasca - Smilodon - Masquerade Dopants
Dopants: Magma Dopant - T-Rex Dopant - Money Dopant - Anomalocaris Dopant - Cockroach Dopant - Sweets Dopant - Virus Dopant - Violence Dopant - Arms Dopant - Bird Dopant - Ice Age Dopant - Triceratops Dopant - Liar Dopant - Puppeteer Dopant - Invisible Dopant - Nightmare Dopant - Beast Dopant - Zone Dopant - Yesterday Dopant - Quetzalcoatlus Dopant - Gene Dopant - Jewel Dopant - Old Dopant - Utopia Dopant - Energy Dopant
Movie Exclusive Villains: Dummy Dopant - Heat Dopant - Trigger Dopant - Metal Dopant - Luna Dopant - Cyclone Dopant - Bat Dopant - Spider Dopant - Kamen Rider Eternal - Commander Dopant - Eyes Dopant
Manga Exclusive Villains (Futo Detective): Road Dopant - Aurora Dopant - Meganeura Dopant -Brachiosaurus Dopant - Scream Dopant - Alcohol Dopant - Puzzle Dopant - Reactor Dopant - Antlion Dopant - Owl Dopant
Katsumi Daido - Maria S. Cranberry - Reika Hanehara - Kyosui Izumi - Gozo Domoto - Ken Ashihara
Community content is available under CC-BY-SA unless otherwise noted.