Kamen Rider 4 is a web series which was released as an accompanying special to the film Super Hero Taisen GP: Kamen Rider 3. It introduced a new rider, Kamen Rider 4, who is the fourth Kamen Rider cyborg created by Shocker after Kamen Riders 1, 2, and 3. The plot goes around a time loop created by the Shocker that resets whenever someone dies, but whenever the loop resets Shocker itself somehow grows stronger and stronger. Thus, it is up to the Riders to decide whether to keep on fighting a useless battle... Or end the loops for good by sacrificing one of their own.

The film depicts the activities of a female financier nicknamed "Silver Shark" Nakajima, who has his own ideas about computer systems, asks Kyoko, a club mama, to contact a mysterious female financier who calls herself "Silver Shark". With Kyoko's help, Nakajima secures a 150 million yen loan from "Silver Shark" and begins working with his partner Nosaka to establish a new company. However, soon after, both Nosaka and the money disappear...

Ginjiro finds that it has become impossible to collect debts when even his regular clients have been conned out of their savings. He discovers that Sugiura gang underboss Domoto is behind these schemes. Domoto wants to take over the gang and tries to ruin Yukino, the real boss’s widow and the gang’s acting head, by sabotaging a resort hotel project with the help of a thug named Kawatani. Ginjiro, who has lent money for the project, is furious when he learns about Domoto’s schemes and goes into action.

Nozomi Hanada, the underboss of the Kanto Saiseikai Obara Group, lives his life on the path of chivalry while protecting his happy family with his wife Komaki and son Toru. One day, a major incident that shakes the Kanto Yakuza society breaks out. Nishimatsu, the chairman of the Saiseikai, decides to have the popular Obara succeed him, instead of the powerful Fukui. However, the ambitious Fukui is not satisfied with the decision and stabs Nishimatsu to death in order to take the chairman's position. He takes the outrageous step of putting the stigma of parent murder on Obara. Nozomi and his friends decide to fight to live the path of chivalry, but an even more cruel fate befalls them.

After assuming the title of second boss of the Obara Group, Nozomi Hanada begins a counterattack against the Kanto Saiseikai Fukui Group.

Ten years have passed since the defeat of the Zangyack Empire, and the Gokaigers have seemingly disbanded and gone their separate ways. On Earth, “Super Sentai Derby Colosseum” has become the hottest gambling venue ever, with various Super Sentai battling each other for charitable causes. Suddenly, Captain Marvelous appears, issuing a challenge to the Colosseum’s administration and those who work for them... including Gai Ikari! Is it the Gokaigers or the people of Earth who have changed in the past ten years? And what of Joe, Luka, Doc, and Ahim? After ten years, an extraordinary battle is about to begin…

20 years after the events of the series, in a world where humans and Worms coexist, what is the purpose of the reactivated ZECT? New Kamen Riders appear.

Detective Joker from Little Tokyo, Los Angeles, USA is dispatched after receiving 211 calls from the police station.

Joe reunites with his ex-lover Serika, unbeknownst that she is the mistress and pawn of Mexican-Japanese crime lord Nicol. Joe’s superiors see Serika as a suspect and a member of Nicol’s gang, so when she disappears, Joe must recruit outside help to get her back. Here a sympathetic female colleague named Sunny and a tearaway member of Nicol’s gang aid him in his search.

A film about the relationship between a mother-daughter robot.

After his fiancée is killed in the crossfire of a yakuza turf war, a man on the edge remorselessly hunts down the gangsters responsible.

A gang of thieves plot to rob a US military base in Okinawa, but rising tensions in the group threaten to put the plan in jeopardy.