Detective Ukyo Sugishita confronts crime on the basis of his own convictions. He has a partner that works for him in the Special Task Unit. For the first 7 seasons, Ukyo’s first partner is Kaoru Kameyama. He is a good-natured, hot-tempered, straightforward and somewhat scattered detective. Beginning in Season 8, Takeru Kanbe replaces Kameyama. Contrary to his predecessor, Takeru is a lanky, cool, conceited and confident detective. From Season 11 to Season 13, Ukyo’s partner is a young detective Toru Kai. Toru is a son of Deputy Director-General of The National Police Agency. But he became a detective by his own effort. And starting with Season 14, Ukyo’s current partner is Wataru Kaburagi, an elite bureaucrat who came to the Metropolitan Police Department on temporary assignment. As the first partner without any career of a police officer, he will face challenging cases together with Ukyo.

Rei, the deadly but reluctant assassin for the Zero Division of the Tokyo Police Department, befriends a young man after she sees him cruising a gay bar looking for johns. After he gets beaten up by a group of street thugs, she takes him in to live with her. When a series of vicious murders takes place, she begins to suspect that the killer may actually be her friend taking revenge on everyone who has abused him. Will she uphold her duty to the police, or protect her only friend?

In different parts of Tokyo, four young and seemingly healthy people suddenly die of heart failure at exactly the same moment. Reporter Kazuyuki Asakawa decides to investigate the deaths, and discovers that the four had stayed at a rural inn together just a week earlier. At the inn, he comes across a strange video that ends with a message saying that anyone who watches it will die exactly seven days later. Now the clock is ticking for Asakawa. Can he break the curse in time?

Nishimaru Nao (Saito Yuki) lives temporarily at the home of Hoshino (Hayashi Ryuzo), a university professor who is an old acquaintance of her mother (Aki Yoko) after the dormitory she was living in burns down and is being rebuilt. However, Hoshino's wife has already passed away, and the family has four sons, the eldest Hoshino Kyohei (Nukukawa Toshikazu), the second son Shinpei (Sawamuki Youji), the third son Yohei (Osawa Hidetaka), and the fourth son Junpei (Nakajima Daisuke), so that they do not make any mistakes and do not see Nao as a member of the opposite sex, Nao enters into a fake marriage and lives in the house as the wife of the family. However, the four brothers are curious about their new mother, Nao, and soon a love affair begins...

Female detective Eiko Kagami traces the mysterious murders of women who all end up dead immediately after sleeping with the popular author of the book, "Crazy Love."

The patriarch of a bickering family announces his retirement, stirring competition about who will succeed him as a leading practitioner of Noh theater, his granddaughter or grandson.

Tomoyo was the lover of Udo, a leading member of the Japanese mafia. When Udo disappears with a bundle of dirty money, she is a suspected accomplice. tomoyo is a woman who has always depended on men, and she often sleeps with them in order to survive. Yuki spent all her time around dangerous men, until her luck finally ran out. Beaten, raped and left in the trunk of a car, she ends up overhearing Udo as he assassinates his fellow mafia agents. Yuki is a woman who has always confronted men, and she often spills blood in order to survive. Thrown together by chance, Tomoyo and Yuki must work together, or die at the hands of the syndicate. They're always ready to love, always read to kill, and never ready to trust.

Sakai, the chairman of the Ichienkai, has collapsed. It brought great ripples not only to the Kanto region but also to the gangster organizations nationwide. The fierce men of each Ichienkai organization who have lost the restraint of Sakai and reveal the original fangs of the gangsters. Among them, the one who exposed the most ambition was Kurobe, the chairman of the largest organization "Tama Union" in the Ichienkai.

A tough and violent battle ensues between Hikaru Gotokuji, who's been assigned as the bodyguard for a popular young entertainer, and the ex-mercenary who is aggressively intent on assassination.

Reiko comes to Tokyo to search for her sister Sumiko, who has disappeared. However, before she knows it, she has fallen in love with her sister's boyfriend, Kazuyuki. A hidden camera captures the two of them engaged in lewd behavior. Behind it shine the mysterious eyes of the man and woman who kidnapped Sumiko. Now another woman is about to become the beasts' prey... 

Shoichi Sakurai meets his girlfriend's father, the legendary drug dealer Mo. This leads to the two of them repeatedly competing against each other, but Mo eventually passes away. Sakurai, who regrets having taken his life, receives news of the Japan Championship and decides to retire after this match. Thus, he faces his final match, but...

The sand group was in danger due to the erosion of the Chukyo Union. Behind the scenes was the darkening of Kurobe of the Tama Union, which is consolidating its position in the Kanto Ichienkai. On the other hand, Jin, who was struck by Mato, lived as a lone wolf at the excommunication of the Ichienkai, despite the concerns of Yoshiro and his friends. Under such circumstances, each organization of the Ichienkai will set up various works.

Jin falls in love with Shoko, a beautiful woman he meets by chance. However, he soon learns that she’s the widow of a recently murdered yakuza boss. In his attempt to support her, Jin unexpectedly gets caught up in a violent gang conflict.