Samurai Detective Onihei: Dangerous Mercy

When he was young, Hasegawa Hirakawa was taken care of by the daughter of an izakaya, who wanted to become a secret agent. Although Hirakawa gave up this wish, Asami began to explore independently for the thief, Kogawara, the murderer, and the net cutter, who Hirakawa was looking for. Although he successfully entered the group of the uncle of the murderer, he fell into a desperate crisis.

A tale of friendship, betrayal, and forbidden love—set against the backdrop of Edo’s criminal underworld. While patrolling the Honjo district, the legendary samurai detective Heizo Hasegawa crosses paths with his old dojo friend, Samanosuke Kishii, and a local ruffian, Hikoju of Sagami. When they discover that Ofusa, the woman they both once loved, has been forced into marriage with a corrupt lord, their reunion takes a dark turn. As secrets from their past resurface, a deeper conspiracy tied to their former mentor begins to unravel—one that will test Heizo’s loyalty, honor, and sense of justice.

The story follows detective Heizo, played by Koshiro Matsumoto, who investigates Tanbei Chigashira, a notorious thief. Kumehachi, a former member of Tanbei's gang, claims that their former leader is an impostor. The real Tanbei Chigashira followed three strict rules: do not kill, do not rape women, and do not steal from the poor.

Master thief Kinosuke arrives in Edo to pull off one final heist for a tea-server who resembles his long-lost love, while Hasegawa Heizo’s spy Kumehachi tries to stop him, only to be exposed and trapped alongside the thief by Kinosuke's own crew.

A mysterious assassin cloaked in a haunting, seductive fragrance sets his sights on Heizo Hasegawa. Hanjiro Kaneko, a master swordsman, attacks with deadly precision, leaving Heizo to uncover the truth behind the strange scent of "White Plum Allure." As Heizo digs deeper, he discovers a tangled web of deception involving Hiko-no-Ichi, a blind decoy working for the notorious bandit leader Heijuro the Snake.

Kishii Samanosuke reunites with Heizo, battling deadly foes to protect a hunted girl and face master thief Koazu no Gentan.

Jirokichi plays around during the day, but at night becomes a completely different person. His nickname is Nezumi-Kozo (“Rat Boy"). Jirokichi steals gold coins from corrupt samurai families and hands it over to the poor. He works with his younger sister Kosode.

When he was young, Hasegawa Hirakawa was taken care of by the daughter of an izakaya, who wanted to become a secret agent. Although Hirakawa gave up this wish, Asami began to explore independently for the thief, Kogawara, the murderer, and the net cutter, who Hirakawa was looking for. Although he successfully entered the group of the uncle of the murderer, he fell into a desperate crisis.

The story follows detective Heizo, played by Koshiro Matsumoto, who investigates Tanbei Chigashira, a notorious thief. Kumehachi, a former member of Tanbei's gang, claims that their former leader is an impostor. The real Tanbei Chigashira followed three strict rules: do not kill, do not rape women, and do not steal from the poor.

A tale of friendship, betrayal, and forbidden love—set against the backdrop of Edo’s criminal underworld. While patrolling the Honjo district, the legendary samurai detective Heizo Hasegawa crosses paths with his old dojo friend, Samanosuke Kishii, and a local ruffian, Hikoju of Sagami. When they discover that Ofusa, the woman they both once loved, has been forced into marriage with a corrupt lord, their reunion takes a dark turn. As secrets from their past resurface, a deeper conspiracy tied to their former mentor begins to unravel—one that will test Heizo’s loyalty, honor, and sense of justice.

Master thief Kinosuke arrives in Edo to pull off one final heist for a tea-server who resembles his long-lost love, while Hasegawa Heizo’s spy Kumehachi tries to stop him, only to be exposed and trapped alongside the thief by Kinosuke's own crew.

After the loss of his wife of 40 years, Eisuke Nakamoto finds solace in a mysterious white dog that no one else can see.

During the Kyoho period in the reign of Tokugawa Yoshimune, there is a gang of thieves active not just in Edo but also the Tokaido and the Nakasendo, and all across the Kansai region, stealing large sums of money with skillful techniques. They only target the very wealthy and never kill or injure people. They appear with the clouds and disappear like the mist. On the night that the beautiful Ochiyo is to become the bride of a dry goods dealer, a large amount of money hidden inside the shop is stolen. The gang disappears without injuring anyone. It was a two-year plan to marry Ochiyo off so that she could bring them in. The leader of this gang is Kumokiri Nizaemon, the greatest bandit of all time. He keeps a rein on his highly-skilled and notorious followers Nanabake no Ochiyo, Kinezumi no Kichigoro, Subashiri no Kumagoro, Ingakozo Rokunosuke and others.

The mini-series revolves around the harem of a shogun in the Edo Period in Japan. The women jostle and compete with one another and with their lord and on occasion even wield more power than their master.

The reign of the eighth shogun Tokugawa Yoshimune in the Edo period, was notable for the “Ooka Sabaki” which supported the Kyoho Reforms that Yoshimune advanced. Yoshimune goes beyond status and the position he has been thrust in, to join with Edo magistrate Ooka Tadasuke and the Western medicine doctor Sakakibara Iori in order to promote the creation of a world for the common people of Edo. These three men deepen exchanges with the magistrate’s office and the townsfolk, uphold justice and struggle to keep order in Edo…

Aoi is a moe-type maid working on a wealthy Osaka estate. In reality, though, she is an undercover detective sent by the police on a special mission to investigate a suspect.