Aoshima, a police detective working in the Bayside Precinct, is continually frustrated by the hierarchy and red tape that plague the system. His friend Muroi is climbing the ladder of the police bureaucracy. Muroi has made a pact with Aoshima that while Aoshima looks after the streets, Muroi would make life easier for the cops on the beat. One day in Bayside, a series of events turns the small station upside down.

After Detective Shunsaku Aoshima is promoted to section chief he has the daunting task of dealing with eight cases at the same time, which includes a murder case, bomb threat, and a bus hijacking. Complications also arise between Detective Aoshima and his juniors.

Yasushi and Yuka, who have both lost their spouses in the past, are brought together by fate and lead a happy life together, blessed with two children. Then one day, their new house, which the couple had painstakingly built together, catches fire due to Yuka's carelessness. Fortunately, no one in the family is seriously injured and Yasushi is relieved, but the shock of the fire causes Yuka to suffer from a neurological disorder called dissociative amnesia, and she is unable to remember even her own name. The doctor tells her that there is no clear cure in modern medicine, which shocks Yasushi, but she accepts Yuka in her current state and decides to walk with her again.

Set 2 years after prior film "Bayside Shakedown 3: Set the Guys Loose," a major case occurs that has the potential to take down the entire police organization. For the next 3 days, Shunsaku Aoshima and his colleagues struggle to unravel the case...

The movie takes place again in the fictional Wangan Station of the Tokyo Metropolitan Police Department the once empty space within Wangan's jurisdiction has become a popular tourist attraction. When a string of murders of company execs begins taking place, Aoshima jumps at the opportunity to pursue something other than his current case, which he finds less than inspiring. However the powers that be have other ideas, and Wangan again plays host to a special investigation team from headquarters. Aoshima's friend Superintendent Shinji Muroi, assigned by headquarters to assist Okita, is again powerless to help the local officers as decisions are made by the higher ups.

Amateur photographer Makoto and the homely but endearing Shizuru meet during their university entrance ceremony and become instant friends. Shy by nature, Makoto finds himself opening up around Shizuru, who is secretly in love with him.

Remake of Chusei Sone's 1983 comedy about a yakuza family trying their luck in show business.

911 receives a call from a young woman reporting the death of an acquaintance at a hotel, and Detectives Ushio and Ogami of Shinjuku West Police Station rush to the scene!! The caller is eventually identified as Megumi, a woman whom Detective Ushio's wife Sumie had met by chance, but Megumi too has been killed...