Nippon Sangoku

At the end of the Reiwa era, Japan was hit by the effects of nuclear war around the world, resulting in an influx of refugees followed by a deadly virus and a devastating earthquake. During this time, the country was mismanaged, with those in power levying heavy taxes, causing famine. Eventually, the people began a revolt that overthrew the national government, but the population was reduced to a tenth of its pre-war size, with the technology reduced to that of the Meiji era, and the country divided into three kingdoms: Yamato, Buo, and Seii. One hundred years later, a man named Aoteru Misumi leads a movement to reunify the country.

Aoteru Misumi (三角 青輝, Misumi Aoteru) Voiced by: Kenshō Ono (Japanese); Alejandro Ruiz (English) Aoteru is a cautious, attentive and by-the-book Yamato citizen from the country, who aims to change his country for the better. Yoshitsune Asama (阿佐馬 芳経, Asama Yoshitsune) Voiced by: Jun Fukuyama (Japanese); Kieran Regan (English) Yoshitsune is an egocentric and clever swordsman of the prestigious Asama clan, who aims for a high position to lead the government.

Denki Taira (平 殿器, Taira Denki) Voiced by: Takashi Nagasako (Japanese); Steve Mize (English) Denki is Yamato's megalomaniac Prime Minister of Home Affairs with a penchant for swift executions. Mitsuhide Ryumon (龍門 光英, Ryūmon Mitsuhide) Voiced by: Kazuhiro Yamaji (Japanese); Ron Banks (English) Ryumon is the diligent and dependable General of the Borderland Army. Yasuaki Kaku (賀来 泰明, Kaku Yasuaki) Voiced by: Yuichi Nakamura (Japanese); Tom Choi (English) Kaku is Mitsuhide's genius right-hand man and tactician. Fuji III (藤3世, Fuji 3-sei) Voiced by: Taihi Kimura (Japanese); Michael Sinterniklaas (English) The cowardly figurehead ruler of Yamato and Denki's son-in-law. Go Sugo (菅生 強, Sugō Gō) Voiced by: Ryōta Takeuchi (Japanese); Brent Mukai (English) Sugo is the Borderland General's Right Vice-General, a patient man of few words. Shiryo Nagamine (長嶺 士遼, Nagamine Shiryō) Voiced by: Shunsuke Takeuchi (Japanese); Andrew Kishino (English) Nagamine is the Borderland General's Left Vice-General, a cutthroat man of action. Tonotsugu Taira (平 殿継, Taira Tonotsugu) Voiced by: Ayumu Murase (Japanese); Michael Johnston (English) Denki's precocious and petulant youngest son, who is given command of the Fukui forces. Junichi Tamaki (玉置 准一, Tamaki Junichi) Voiced by: Kazuyuki Okitsu (Japanese); Darius Johnson (English) Tamaki is the Assistant Librarian of Yamato and Tonotsugu's tutor. Yoshinaga Sato (佐藤 義長, Satō Yoshinaga) Voiced by: Yōji Ueda (Japanese); Paul St. Peter (English) Sato is the dependable commander of Kuzuryu Castle. Hina Hiraizumi (平泉 緋那, Hiraizumi Hina) Voiced by: Chinatsu Akasaki (Japanese); Kristen McGuire (English) Hiraizumi is the fiercely loyal assistant to the commander of Kuzuryu Castle. Kinta Moriyama (守山 金汰, Moriyama Kinta) Voiced by: Nobuaki Kanemitsu (Japanese); Brook Chalmers (English) Moriyama is the Archivist Director of the Borderland Forces who is charmed by Ohga. Saki Higashimachi (東町 小紀, Higashimachi Saki) Voiced by: Asami Seto (Japanese); Ratana (English) Aoteru's righteous and no-nonsense wife. Shiori Taira (平 汐莉, Taira Shiori) Denki's cheerful daughter and later Yoshitsune's wife.

Ohga Wajima (輪島 桜虎, Wajima Ōga) Voiced by: Minami Tsuda (Japanese); Jennifer Sun Bell (English) Ohga is the new Supreme Commander of Seii, who took power through a coup, to avenge her father Byakko, a previous Seii Supreme Commander that was killed in conflict with Yamato. Yayakichi Hei (閉伊 弥々吉, Hei Yayakichi) Voiced by: Kenyu Horiuchi (Japanese); June Yoon (English) Yayakichi is the senior strategist of Seii, who raised Ohga alongside his children and supports her in the war with Yamato. Aterui Kura (九羅 亜輝威, Kura Aterui) Voiced by: Shunsuke Sakuya (Japanese); Michael Sorich (English) Kura is a battle-hungry soldier and Seii's Military Affairs Supervisor. Muuton Nagao (長尾武兎惇, Nagao Mūton) Voiced by: Shūichirō Umeda (Japanese); John Patneaude (English) Muuton is a young soldier seeking for Ohga's affection and Seii's Negotiation Supervisor. Yasuke Hei (閉伊 弥輔, Hei Yasuke) Voiced by: Atsushi Tamaru (Japanese); Clifford Chapin (English) Yasuke is Yayakichi's younger son who follows in his footsteps as shrewd strategist. Daisuke Hei (閉伊 大吉, Hei Daisuke) Voiced by: Tsuguo Mogami (Japanese); Jamison Boaz (English) Daisuke is Yayakichi's older passionate, but dim son and 2nd Division Commander. Jien Hibi (日比 慈延, Hibi Jien) Voiced by: Seiichiro Yamashita (Japanese); David McKahan (English) Jien is the 1st Division Commander of the Seii army. Haruichi Azami (芥生 葉瑠壱, Azami Haruichi) Voiced by: Shinpachi Tsuji (Japanese); Paul St. Peter (English) Azami is the 8th president of Seii, who took power after the loss of Byakko Wajima.

Momokuni Hojo (北条 桃国, Hojo Momokuni) Voiced by: Hōchū Ōtsuka (Japanese); William Salyers (English) Hojo is the elderly, but jovial and exploitative leader of Buo, who speaks with early Reiwa-era phrases. Juro Musashikami (武神 十郎, Musashikami Juro) Voiced by: Chō (Japanese); Michael Johnston (English) Musashikami is the elderly, but still capable strategist of Buo, who mostly whispers or mumbles and an interpreter speaks for him. Himehito Okimi (大君 姫人, Okimi Himehito) Voiced by: Takeo Ōtsuka (Japanese); Brent Mukai (English) Okimi is a clever young descendant of the pre-Sangoku era royalty and distant relative of Fuji III, who fled to Buo.

Written and illustrated by Ikka Matsuki, Nippon Sangoku began serialization on Shogakukan's Ura Sunday website and MangaONE app on November 24, 2021. Its chapters have been compiled into seven tankōbon volumes as of April 2026. On June 1, 2026, Matsuki announced the manga was going on hiatus due to him recovering from steroid withdrawal syndrome.

An anime television series adaptation was announced on January 27, 2026. The series was produced by Studio Kafka, co-produced with Amazon MGM Studios, and directed by Kazuaki Terasawa, with Teruko Utsumi handling series composition, Takahiko Abiru designing the characters and serving as chief animation director, and Kevin Penkin composing the music. Megumi Han provided the narration. It aired from April 7 to June 23, 2026, on Tokyo MX and BS NTV. The opening theme song is "Hidane" (火種; 'Flashpoint') performed by Tatsuya Kitani, while the ending theme song is theme song is "Chikai" (誓い; 'Oath') performed by Leina. Amazon Prime Video began streaming the series worldwide on April 5, two days before the scheduled broadcast on Japanese linear television.