Double Meaning: Chain Reaction

When a devoted detective probes the suspicious death of her father, she uncovers massive corruption and finds herself in grave danger.

Natsumi Yukihira (Ryoko Shinohara) receives secret documents of an organization that controls the country from the shadows. Because of this, Natsumi's ex-husband, Kazuo Sato (Teruyuki Kagawa) pays a terrible price. Natsumi goes back to the Investigation #1 of Tokyo Metropolitan Police Department to take on the organization, but Natsumi becomes involved in a new case. She gets closer to the final enemy.

The ST team at the Tokyo Metropolitan Police Department consists of eccentric members. Some members do not cooperate with others and others do not reveal themselves in front of others. With Samon as the leader of the ST team and young Inspector Tomohisa tasked with managing the team, the ST (Scientific Task Force) attempt to solve the most difficult of cases.

Lone wolf detective with an enormous personal grievance seeks to connect the mysterious death of his daughter to an urban legend of a villain who terrorizes Japan by insinuating himself into people's dreams and the collective psyche of the Japanese people.

An illegal biological weapon K-55 is stolen from a university lab. The university lab can't even call the police because the secret nature of the weapon. The school lab then receives a message stating that the entire country is now being held hostage and they must pay a ransom of 300 million yen.

A bruised and battered corpse in Shibuya, Tokyo has the attention of the local cops. A veteran detective is assigned to the case. The last utterance of the victim is one clue that detective Imanishi has to work on. Yet, the case becomes more tangled quickly. Elsewhere, a prodigy named Waga Eiryo is composing an orchestral piece. Remake of The Castle of Sand (1974).

To combat rising crime and terrorist activities in Japan, the Japanese National Police Agency authorizes the formation of a secret motorcycle unit known as the Wild 7. The motley group consists of reformed convicts - ranging from simple thugs to former Yakuza members. The Wild 7 are tasked to take out criminals the police cannot touch - due to the criminal's connections with politicians and wily lawyers.

When a gun belonging to a police officer is stolen, it ends up in the hands of a student, who decides to use it on a yakuza who beat him recently. Now the police officer is hot on the student’s trail, and he’s determined to prevent the gun from going off.

Three murder cases take place in Tokyo. Numbers are left at the murder scenes, possibly hinting at where the next murder will take place. An investigation begins of the serial killer and Detective Kosuke Nitta works on the case. He believes the next murder will take place at Hotel Koruteshia Tokyo. To catch the killer, Kosuke Nitta goes undercover and begins working at the front desk of the hotel. Naomi Yamagishi works at the front desk of Hotel Koruteshia Tokyo. She is selected to train Kosuke Nitta for his front desk job, but they can't get along. Kosuke Nitta is focused on catching the killer, but Naomi Yamagishi prioritizes the safety of the guests. As they begin to understand each others differences, they also begin to build a trust between each other. Who is the murderer?

After Shogo Ogami’s death in Hiroshima, Detective Shuichi Hioka successfully implemented Shogo Ogami’s plan, which was to control the yakuza to prevent further gang wars and save innocent people from getting harmed. Shuichi Hioka manages the criminal organizations, but, due to one evil person who gets released from prison, the situation drastically changes.

Kida and Makoto grew up together because they have it in common that they don't have parents. And a transfer student, Yotchi, also gets along with them because she has a similar background, which is that they come from not such a good home environment. They spent their school life supporting each other. But, at the age of 20, Yotchi disappeared. Then Lisa, the daughter of a politician and a top model, appears in front of the two men. Makoto takes an unusual romantic interest in Lisa, who lives in a different world from them, and asked her out to dinner, but she does not take him up on it at all. Kida warns Makoto to give up on her because they live in different worlds, but Makoto quits his job and vanishes without a trace.

Akira Yamazaki and Akira Kaido are new employees at Industrial Central Bank. They are both outstanding at their jobs and fierce rivals, but they come from totally different backgrounds. When Akira Yamazaki was a child, his father's factory went bankrupt and his family ran away in the middle of the night. Because of that experience, Akira Yamazaki wants to work as a banker to save people. On the other hand, Akira Kaido was born into a family that runs a large company. He works with a calm demeanor. Due to a case, Akira Yamazaki receives a demotion. Akira Kaido continues to be successful at work, but his family's company is on the verge of bankruptcy due to their family-oriented management style. The employees there and their families are all in a crisis situation. With this desperate situation unfolding, the reversal of fate of these two men begin.

Set in the late 21st century, an MRI scanner is introduced at the National Research Institute of Police Science's 9th Forensics Laboratory. The machine is able to scan the memories from even the deceased. As ethical questions arise over the machine's use, the 9th Forensics Laboratory members, including rookie Ikko Aoki and Chief Tsuyoshi Maki, struggle to solve cases.

Michiko Oshitani, who lived in Shiga Prefecture, is found dead at an apartment in Tokyo. She was strangled to death. Mutsuo Koshikawa is the owner of the apartment and he goes missing. Detectives including Yuhei Matsumiya who is a cousin of Detective Kyoichiro Kaga , have difficulties in solving the case. They can't find a connection between Michiko Oshitani and Mutsuo Koshikawa. They soon learn that Michiko Oshitani came to Tokyo to visit Hiromi Asai . They graduated from the same school, but there isn't a connection between Hiromi Asai and Mutsuo Koshikawa. Detective Yuhei Matsumiya finds something near Michiko Oshitani's body. That something has the names of 12 bridges surrounding the Nihonbashi area of Tokyo. Detective Kyoichiro Kaga learns of the clue and becomes agitated. There's a connection with his late mother

A no-nonsense detective with a reputation for pushing limits investigates a rash of brutal murders connected by a series of cryptic short stories.

Reiko Himekawa is a female detective at the Metropolitan Police Department. Reiko doesn't come from an elite background, but she has risen fast through the ranks with hard work and gain the respect of the policeman.

An explosion take place in a street of Tokyo. Many people were killed or seriously injured. One casualty is Chihiro, the wife of Public Security chief inspector Kuraki Naotake. While trying to find why his wife was being implicated in the explosion case, Kuraki comes into contact with Public Security sergeant Akeboshi Miki and Metropolitan Police Department inspector Osugi Ryota who are also investigating this case.

"Ouroboros" is an ancient symbol that depicts a snake eating its own tail - meaning infinity. Based on a popular comic, a clumsy detective and a cool gang stand up to true evil. Ikuo and Tatsuya grew up in a children's orphanage together. When their favorite teacher, Yuiko, is murdered, a policeman wearing a gold watch covers up the incident. Ikuo and Tatsuya promise each other to avenge their teacher someday. Twenty years later, Ikuo is a detective in Shinjuku second police station investigating various cases with elite detective - Mizuki, while smart and handsome Tatsuya has become one of the top members of a gang group.

Satomi Shinobu works in the Mobile Investigation Unit of The Tokyo Metropolitan Police Department. The Mobile Investigation Unit conducts the initial investigation at all crime scenes. He works with Inokuma Yuki. They are a couple, but they keep their relationship a secret at work. They both hope to work at the #1 Investigation Station. One day, they meet beautiful Tachibana Kara at the site where a dead body was found. Kara appears at the other crime scenes involving grotesque murders. She shows an interest in Yuki. Satomi Shinobu thinks it's a bad sign for Yuki. To protect his girlfriend from danger, he struggles to find uncover the truth behind the serial murder cases and Kara’s identity.

The First Investigative Division is the star unit of the Tokyo Metropolitan Police Department. Jun'ichi Ōiwa, the head of the division, leads around 400 elite detectives. He has an extremely heavy responsibility: attends initial investigations at the scenes of all brutal crimes that occur within the metropolis, decides on the course of action of the investigations at the same time as he directs many investigation task forces and gets into investigations himself at the critical phase. However, Ōiwa is definitely not a superman. Amid his suffering, Ōiwa overcomes this grave responsibility and is quite simply a "life-size hero" and "ideal boss" to his subordinates.

In 2008, Isao Sudo is found dead in Shizuoka Prefecture. He ran a used car store in Tokyo. Detective Satoru Kusaka from Shizuoka Prefecture investigates the death of Isao Sudo. He learns that in 1974, Isao Sudo's son was kidnapped and killed in Shizuoka Prefecture. In 1988, Seiichiro Shigeto (Takaya Kamikawa) was appointed to lead a team of 6 detectives and they reinvestigated the kidnapping and murder case involving Isao Sudo's son. Detective Satoru Kusaka has a hunch that the case involving the death of Isao Sudo's son will lead to the case involving the death of the father. Detective Satoru Kusaka meets Seiichiro Shigeto to gather information.

Reiko Himekawa is just 27-years-old, but she has already received a promotion to become an assistant police inspector. She leads the 10th murder investigation team at the First Investigation Division of the Tokyo Metropolitan Police Department. Reiko Himekawa is an excellent detective and deals with many difficult cases. She works with Tamotsu Ishikura, Kohei Yuda and Shinji Otsuka on her team. The team then gets Kazuo Kikuta as a new member. Kazuo Kikuta is a detective who does not talk much, but looks to do the right thing.

Takashi Oshii is a detective with excellent reasoning power. Unfortunately, he usually misses the criminal in front of him and other detectives get recognition for the capture. He is transferred to the Utobashi Police Station. Takashi Oshii goes to a record company CEO's house. The CEO's third son was burned to death. The police are set to conclude that his death was an accident, but Takashi Oshii thinks otherwise. Takashi Oshii begins to investigate.

Hana comes from a family that has been thieves for generations. Hana refuses to become a thief and she wants to live a normal life. She currently works as a librarian and she is dating Kazuma, who works as a public officer. She hears that Kazuma's family are all public officers. One day, Hana visits Kazuma's family. She discovers that Kazuma's family, including Kazuma, are actually all police officers. Hana gets involved in a case and falls into trouble.

Who is the killer? Who stole the $10 million? The doubts, lies, suspicion, and betrayal are unstoppable as one detective launches an evil mutiny in this unconventional police mystery drama where nothing goes as you predicted.

An ex-gymnastic teacher working as a police detective and a super-elite Tokyo University graduate prosecutor are to become a bizarre buddy. They always clash head-on, but eventually they find themselves sharing the same chemistry within themselves.

A recent widower and acclaimed poet, enigmatic Inspector Adam Dalgliesh employs his exceptional empathy and insight to plumb the darker depths of the human psyche while investigating complex crimes in 1970s England.