Nippon Sangoku anime reveals new cast, ending song ahead of April 5 premiere

We are finally getting to see Nippon Sangoku, the long-awaited political drama anime, which will be premiering this coming 2026 Spring. Based on the manga written by Ikka Matsuki, this anime series is set in the not-too-distant future where there are now three rivals for control over what remains. Already, tons of details and press releases have been made available about what to expect from the premiere, located in the three competing nations' capital cities.

Nippon Sangoku has now officially added four new voice cast members and announced the ending theme song's title. The third promotional trailer shows off Leina's performance of Chikai (Oath), the anime's ending theme.

The series will premiere on Amazon Prime Video in over 240 countries and territories on April 5. To view Nippon Sangoku before anyone else in Japan, tune in to U-NEXT at 9:00 p.m. on April 6. After that, the first television broadcast will start on April 6/7 (00:00 JST) on Tokyo MX and BS NTV. Masterpiece Gaming will be streaming Nippon Sangoku from April 5 as well.

Four New Voice Actors Join the Cast

Some exciting new talents are coming into the Nippon Sangoku cast. Kenyū Horiuchi will voice Yayakichi Hei, and Shūichirō Umeda will voice Nagao Muuton. Shunsuke Sakuya will take on the role of Akii Kura, while Tonotsugu Taira will be voiced by Ayumu Murase.

These four actors will join an already impressive cast of:

Kenshō Ono as Aoteru Misumi
Asami Seto as Saki Higashimachi
Jun Fukuyama as Yoshitsune Asama
Kazuhiro Yamaji as Mitsuhide Ryūmon
Yūichi Nakamura as Yasuaki Kaku
Taihi Kimura as Fuji III
Minami Tsuda as Ōga Wajima
Takashi Nagasako as Denki Taira
Megumi Han as the Narrator

Ending Theme Song Confirmed

The series ending song is called Chikai, which means "Oath." Leina, the singer-writer, will perform it, and we were given a chance to hear it in the third official trailer. Therefore, this gives the series a strong emotional effect before it begins.

The opening theme song is called Hidane (Flashpoint), and the performer is Tatsuya Kitani. Both songs will give the overall theme of political conflict and self-ambition in this series

Staff and Production of Nippon Sangoku

This series is animated at Studio Kafka. The full production staff is as follows:

Director: Kazuaki Terasawa (The Ancient Magus' Bride Season 2)
Series Composition: Teruko Utsumi (Sarazanmai, You and I Are Polar Opposites)
Character Design / Chief Animation Director: Takahiko Abiru (Vinland Saga)
Art Director: Seiki Tamura (The Ancient Magus' Bride Season 2)
Music: Kevin Penkin (Made in Abyss, The Apothecary Diaries)
3D Director: Kōhei Ogawa
Sound Director: Shōji Hata
Editing: Daisuke Imai (JAYFILM)
Color Key Artist: Yūko Kobari

Studio Kafka also released a specially drawn pre-premiere visual to mark the occasion.

About the Series

Set in a post-apocalyptic and near-future Japan, with its rampant corruption, environmental devastation, and nuclear warfare, Nippon Sangoku is about three warring factions vying for control of the decimated nation. Aoteru Misumi, the tale's lead character, is an average bureaucrat who uses intellect and diplomacy instead of violence to come up with a plan to unite the divided country, thus beginning his own legendary rise to fame.

Edited by Akihito Chakma

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