When was the film 'Infinity Castle' released in Japan?

The first of three parts, 'Infinity Castle. Part 1: Akaza's Return', was released in Japan on July 18, 2025. The release date for the second part has not been officially announced as of September 2026.

How is 'Infinity Castle' written and read in Japanese?

無限城, read むげんじょう (Mugenjō): 無限 — 'infinite, boundless', 城 — 'castle, fortress'. The literal translation matches the English title — there is no discrepancy in meaning here, unlike many other titles in the franchise.

What are the Demon Slayer arcs called in Japanese?

In order: 竈門炭治郎立志編 (Tanjiro's rise, 2019), 無限列車編 (Mugen Train, 2020–2021), 遊郭編 (Entertainment District, 2021–2022), 刀鍛冶の里編 (Swordsmith Village, 2023), 柱稽古編 (Hashira Training, 2024), and 無限城編 (Infinity Castle, from 2025).

When was 'Infinity Castle' released in cinemas?

In Japan, the first part of the trilogy was released on July 18, 2025, and in the US and Europe in September 2025. The Japanese title of the film is 無限城編第一章猗窩座再来, 'Infinity Castle. Part 1: Akaza's Return'.

What does 遊郭 mean in the arc title 'Entertainment District'?

Literally, 遊郭 means 'pleasure district', a licensed entertainment quarter of old Japan. The English title of the arc, 'Entertainment District', conveys the same meaning in a more recognizable way for English readers, rather than translating the word literally.

Infinity Castle in Japanese: 無限城 and the Names of All Demon Slayer Arcs

Q: What are the Demon Slayer arcs called in Japanese?

In order: 竈門炭治郎 立志編 (Tanjiro's rise, 2019), 無限列車編 (Mugen Train, 2020–2021), 遊郭編 (Entertainment District, 2021–2022), 刀鍛冶の里編 (Swordsmith Village, 2023), 柱稽古編 (Hashira Training, 2024), and 無限城編 (Infinity Castle, from 2025).

Demon Slayer Infinity Castle in Japanese is 鬼滅の刃無限城編 (Kimetsu no Yaiba, Mugenjō-hen). The Infinity Castle itself is 無限城 (Mugenjō), the extradimensional fortress of the main demon where the story's finale unfolds. The first of the film trilogy's three parts was released in Japan on July 18, 2025.

Infinity Castle in Japanese: 無限城 and the Names of All Demon Slayer Arcs

Demon Slayer has six anime arcs, and each has its own Japanese name. Let's break down how Infinity Castle, Swordsmith Village, Hashira Training, and the rest are called in Japanese, what these names mean literally, when the first part of the final arc film was released, and why the English title 'Demon Slayer' is not a literal translation of the Japanese title.

What Is the Infinity Castle and When Does the Film Come Out

The Infinity Castle (無限城, Mugenjō) is the extradimensional fortress of the demon Muzan Kibutsuji, where the decisive battle of Demon Slayer is moved in the finale of the story: Tanjiro Kamado and the other heroes of the story end up here. What happens there and how the plot ends is a spoiler that is not revealed here. The name also became the title of the film trilogy adaptation: the first part, 'Infinity Castle. Part 1: Akaza's Return' (第一章猗窩座再来), was released in Japan on July 18, 2025.

Three Parts, Not One Film

Studio ufotable is adapting the final arc as a trilogy. The first part was released in Japan in July 2025, and in the US and Europe in September of the same year. As of September 2026, the release date for the second part has not been officially announced.

The Name and Kanji: 無限城

Arc	Japanese Title	Reading	Literal Meaning
Season 1 (2019)	竈門炭治郎立志編	かまどたんじろうりっしへん	'Tanjiro Kamado: The Part About Resolve'
Mugen Train (2020 film, 2021 series)	無限列車編	むげんれっしゃへん	'The Part About the Infinite Train'
Entertainment District (2021–2022)	遊郭編	ゆうかくへん	'The Part About the Pleasure District'
Swordsmith Village (2023)	刀鍛冶の里編	かたなかじのさとへん	'The Part About the Swordsmith Village'
Hashira Training (2024)	柱稽古編	はしらげいこへん	'The Part About the Hashira Training'
Infinity Castle (from 2025, film trilogy)	無限城編	むげんじょうへん	'The Part About the Infinity Castle'

城 — значение: castle, fortress — онъёми: ジョウ、セイ — кунъёми: しろ — 9 штрих(ов). 城 — 'castle, fortress': 9 strokes, the second character in 無限城, 'Infinity Castle'.

Japanese	Reading	Translation
鬼滅の刃	Kimetsu no Yaiba · Kimetsu no Yaiba	the title of the whole story — 'Demon Slayer'
無限城	Mugenjō · Mugenjō	'Infinity Castle' — the antagonist's fortress in the final arc
刀鍛冶の里	katanakaji no sato · katanakaji no sato	'swordsmith village' — the setting of one of the arcs
柱稽古	hashira geiko · hashira geiko	'hashira training' — another arc of the story
鬼	oni · oni	demon — the enemy of the demon slayers in this story
柱	hashira · hashira	'pillar' — the rank of the strongest demon slayers

Write 城 along the guides — 'castle', the second character in 無限城, 'Infinity Castle'.

How 鬼滅の刃 Is Read

鬼滅の刃 is read きめつのやいば (Kimetsu no Yaiba): 鬼 'demon', 滅 'destruction, extermination', の — possessive particle, 刃 'blade, edge'. Literally — 'blade of demon extermination', without the verb 'slaying': the official English title 'Demon Slayer' is a loose but accurate translation in meaning, not a literal one.

Literal Translation and Loose Adaptation in the Titles

遊郭 (yūkaku) literally means 'pleasure district', a licensed entertainment quarter of old Japan; in English translation and fandom, the same arc is called 'Entertainment District' — a more recognizable image of the same phenomenon for English speakers.
柱 (hashira) literally means 'pillar, support': this is what the strongest swordsmen are called in the corps, not an architectural detail of a castle or house.
刀鍛冶 (katanakaji) is not an abstract 'smith' but specifically a 'swordsmith': 刀 'sword', 鍛冶 'forging, smithing'.
無限 (mugen), on the contrary, is translated without any liberty: in the titles 'Infinity Castle' and 'Mugen Train', the English word conveys the Japanese one-to-one — 'without limit, without bounds'.

In What Order to Watch the Arcs

The arcs should be watched in release order, as in the table. The film 'Mugen Train' continues the first season, and the 'Infinity Castle' trilogy begins right after 'Hashira Training'. The official English title of 無限城 is Infinity Castle, which is the same as the literal meaning.

FAQ

What is the Infinity Castle in Demon Slayer?: The extradimensional fortress of the demon Muzan Kibutsuji, where the decisive battle of Demon Slayer is moved in the finale of the story. The details of the plot and how it all ends are a spoiler that is not revealed here.
When was the film 'Infinity Castle' released in Japan?: The first of three parts, 'Infinity Castle. Part 1: Akaza's Return', was released in Japan on July 18, 2025. The release date for the second part has not been officially announced as of September 2026.
How is 'Infinity Castle' written and read in Japanese?: 無限城, read むげんじょう (Mugenjō): 無限 — 'infinite, boundless', 城 — 'castle, fortress'. The literal translation matches the English title — there is no discrepancy in meaning here, unlike many other titles in the franchise.
What are the Demon Slayer arcs called in Japanese?: In order: 竈門炭治郎立志編 (Tanjiro's rise, 2019), 無限列車編 (Mugen Train, 2020–2021), 遊郭編 (Entertainment District, 2021–2022), 刀鍛冶の里編 (Swordsmith Village, 2023), 柱稽古編 (Hashira Training, 2024), and 無限城編 (Infinity Castle, from 2025).
When was 'Infinity Castle' released in cinemas?: In Japan, the first part of the trilogy was released on July 18, 2025, and in the US and Europe in September 2025. The Japanese title of the film is 無限城編第一章猗窩座再来, 'Infinity Castle. Part 1: Akaza's Return'.
What does 遊郭 mean in the arc title 'Entertainment District'?: Literally, 遊郭 means 'pleasure district', a licensed entertainment quarter of old Japan. The English title of the arc, 'Entertainment District', conveys the same meaning in a more recognizable way for English readers, rather than translating the word literally.

Sources

Updated: 2026-09-13