Watch "Nihontouitsu Series: Season 1" on Netflix Japan

After the young Himuro and Tamura take down a local yakuza family, they leave Yokohama and head to Kobe where they meet Kawatani of the Kyowa Clan.

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As Himuro's sharp mind serves him well in the yakuza hierarchy, executive officer assignments trigger a critical rift within the Kyowa Clan.

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With the Kyowa and Shinto Clans in open conflict, Tamura looks for a chance to kill the head of the Shinto Clan as others attempt to forge a truce.

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While the Kyowa Clan aims to unify Japan's yakuza after winning the war with the Shinto Clan, both Tamura and Himuro see unexpected faces in prison.

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In prison, Himuro gets a letter asking him to consider transferring to Kawatani's family. The rumors of Himuro's lack of loyalty anger Omiya.

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Himuro takes responsibility for Omiya's death. Tamura succeeds the Omiya Family and targets Osaka, setting up a showdown between the former friends.

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As both Himuro and Tamura set their sights on Osaka, the Kyowa Clan takes advantage of an attack on an officer to declare war and invade the city.

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While Himuro establishes a new organization for the family and makes moves into the worlds of business and politics, a new conflict brews in Gifu.

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Two senior officers of a Nagoya yakuza family clash as their boss's health fails, and the Kyowa Clan sets out to take advantage of the widening rift.

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Minor trouble with a right-wing political group escalates and claims the life of a senior Kyowa Clan officer, leaving Himuro and others in shock.

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A power vacuum left after the death of the Gijin Clan boss triggers new fighting in Shikoku, and Himuro heads there to stoke the flames.

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Both Himuro's Kyowa Clan and Akimoto's Marugami Alliance set their sights on the Tohoku region, where conflict brews over a local family succession.

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Himuro travels north to join the Tohoku fray, and a brief pause in the fighting comes to an end when a gunman attacks a Kyowa-linked loan company.

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While the war in the Tohoku region intensifies after an attempt to assassinate the Shinyu Clan's Hirakawa, Himuro pursues the man pulling the strings.

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As the Kyowa Clan and West Japan Mutsumi Association keep a wary eye on each other, the small Sakashita Family in Fukui challenges the Kyowa Clan.

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While the Kyowa chairman recovers from a gunshot wound, Himuro is targeted as well. A captured hitman admits that Sakashita ordered the attack.

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After confirming that Fukumoto of the West Japan Mutsumi Association was behind the attempt on Kudo's life, Kawatani declares all-out war.

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Akimoto’s incarceration and the retirement of the Marugami Alliance chairman re-ignite tensions in Kanto, while Fukumoto makes a new move in the west.

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In Kumamoto to resolve a succession dispute, Himuro is attacked by gunmen. Meanwhile, the rift in Kanto's Marugami Alliance turns deadly.

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Himuro plans his own attack against Fukumoto, but betrayal puts a target on Himuro's back.

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Himuro incurs a heavy loss. As Kawatani is named the leader of the Kyowa Clan, a high-ranking member of the Marugami Alliance is released from prison.

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After rising to the upper echelons of the Kyowa Clan, Himuro begins negotiations with the Marugami Alliance to further consolidate his power.

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As the Tohoku conflict comes to an end, Himuro gets dispatched to Okinawa and Tamura to Hokkaido to spread the Kyowa Clan's influence further.

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To strengthen their takeover of Japan, the Kyowa Clan focuses on restructuring their organization, causing tensions within.

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After Kawatani's assassination attempt, Himuro senses that there is a betrayer in their midst.

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As Tamura and his assassination squad deal with a corrupt detective, the Kyowa Clan deals with increasing disaffection within their ranks.

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An internal rift divides the Kyowa Clan, erupting into a war involving the Tokai region.

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The Kyowa Clan set their sights on the Hokuriku region, while Tamura vows revenge for Shibuya's assassination.

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At long last, Himuro vows to destroy the Marugami Alliance, putting Munakata in an impossible position.

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As they move into the Kanto region, the Kyowa Clan bumps up against their enemies, the Marugami Alliance, once again.

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Threatened by Himuro's presence in Yokohama, the Chinese mafia make moves against the Kyowa Clan.

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The Kyowa Clan and the Marugami Alliance face off with a common enemy: the Chinese mafia.

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With members of his clan getting arrested, Himuro has his back against the wall as his war against the Marugami Alliance ramps up.

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In a long awaited confrontation, Himuro sits the chairman of the Marugami Alliance down for a man-to-man talk.

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The Kyowa Clan's top brass are surprised to learn that Baba has miraculously survived. Returning to action, Baba implores Kawatani not to retaliate.

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After a drugged-up man stabs a police officer, Himuro and Tamura visit a former clan member who knows the attacker to locate the source of his drugs.

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Convinced that Mayumi and Hayato know the whereabouts of the missing drugs, the Chinese mafia pursues the siblings. Himuro goes to Mikami for help.

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After a Marugami Alliance-affiliated clan’s member is killed and ties are cut with another member, its leader turns to the Kyowa Clan for protection.

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As tensions rise between the Kyowa Clan and Marugami Alliance, Himuro leaves for Nagoya, where he suspects his rivals will make their next move.

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Seeking a dramatic showdown, Himuro provokes Tatsumi and Kikumura into coming to Nagoya. However, things don't go as smoothly as he planned.

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A former Tsurumi Clan leader is arrested after a triple murder. Hearing that Kizuchi has been caught by the cops, Himuro and Tamura return to Nagoya.

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Himuro promotes Kawagami within the Kyowa Clan. Later, he heads to Ibaraki to learn how a plot of land has ended up in the Marugami Alliance’s hands.

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A crooked land broker named Dave Uchino obtains the rights to the land in Ibaraki. Himuro and Tamura suspect involvement from Iwao of the Sakota Clan.

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Intending to pledge his loyalty to Sakota, Hirono stages a raid on the Fujishiro Clan’s office to start a conflict between Himuro and Nakamori.

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Himuro and Tamura meet with their old comrade Saito, who has finally been released from prison. That evening, Saito gets involved in a fight.

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Minamida and Saito go rogue and assassinate Ezaki. Oba takes responsibility for the incident, but Himuro fears Shinji will remain out of control.

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When TV personality Ebijima gets into trouble for a comment he makes during a broadcast, Himuro goes to Tokyo and attempts to diffuse the situation.

Available on Netflix Japan

Available on Netflix Japan

Available on Netflix Japan

Available on Netflix Japan

Available on Netflix Japan