A collaboration event commemorating the broadcast of the fourth season of the anime *Iruma-kun: The Demon Has Entered!* will be held from September 1 to October 31, 2026.

The event will take place at two venues—the Shinjuku Prince Hotel and the Kawagoe Prince Hotel—each featuring a different theme: “Demon World Hotel” and “Music Festival,” respectively.

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Iruma-kun × Prince Hotel Event Overview

A collaboration event is being held to commemorate the broadcast of the fourth season of the anime “Demon Slayer: Iruma-kun,” based on the popular manga by Osamu Nishi.

The event will take place at two venues: the Shinjuku Prince Hotel and the Kawagoe Prince Hotel. It will run from September 1 to October 31, 2026.

According to official sources, each hotel will have its own theme, offering “distinct Demon World experiences.”

Additionally, hotel guests can listen to exclusive voice recordings by Iruma Suzuki.

Reservations opened on June 25, 2026, at 12:00 PM.

Iruma × Kawagoe Prince Hotel Stay Package

The theme of the Kawagoe Prince Hotel is the “Music Festival,” which is also the theme of Season 4.

©Osamu Nishi (Akita Shoten)/”Iruma-kun” Season 4 Production Committee

According to the official description, the room is decorated with stage-like elements, musical notes, and striking sheet music, allowing visitors to immerse themselves in the world of the show alongside the “Problem Child (Abnormal)” class.

“Demon Slayer: Iruma-kun Music Festival Concept Stage Room”

Rates	Starting at 10,500 yen per person (based on 2 guests sharing a room)
Room Type	Twin Room B
Inclusions	1 night’s stay, plan-exclusive original merchandise (clear pouch with logo, character acrylic stand, original card key)
Inquiries	049-227-1118 (Accommodations)

© Osamu Nishi (Akita Shoten)/”The Devil Is a Part-Timer!” Iruma-kun Season 4 Production Committee
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The article continues after the following advertisements

Iruma-kun × Kawagoe Prince Hotel Collaboration Menu

The collaboration menu will be served at the Kawagoe Prince Hotel’s Lobby Lounge (1F).

Kawagoe Prince Hotel Collaboration Menu

Collaboration Drinks	1,300 yen each Iruma Suzuki / Asmodeus Alice / Varac Clara / Puruson Soy ▸ Original Coaster (1 random piece)
Iruma-kun’s Indulgent Extra-Loaded Pancakes	1,500 yen ▸ Original Postcard (1 piece)
Pancake & Collaboration Drink Set	1,500 yen ▸ Original Clear Card (Set of 5)
Hours	11:00 a.m.–6:00 p.m. *120-minute time limit

Pancakes

Pancakes & Drink Set

© Nishi Osamu (Akita Shoten)/”Iruma-kun: The Demon Has Entered!” Season 4 Production Committee

There are four types of collaboration drinks in total.

Collaboration Drinks

Collaboration Drinks

Collaboration Drinks

Collaboration Drinks

©Nishi Osamu (Akita Shoten)/”Demon Slayer: Iruma-kun” Season 4 Production Committee

Reservations for pancakes and set menus must be made by 12:00 PM the day before your visit.

*Prices include consumption tax. A service charge (13%) will be added separately at the time of payment. *One restaurant-exclusive gift will be provided per item purchased. Offer ends when supplies run out.

Iruma-kun × Shinjuku Prince Hotel Stay Plan

The theme of the Shinjuku Prince Hotel is “Demon World Hotel.”

According to the official announcement, this package features the hotel’s one-and-only Immersive Room, created with a 75-inch large screen, surround sound, and synchronized lighting. Guests will be greeted by decorations featuring Iruma-kun and his friends dressed as hotel staff, and there’s a scavenger hunt to find hidden characters that glow under blacklight.

While the Kawagoe plan includes one acrylic stand, the Shinjuku plan comes with three different types.

Iruma-kun × Shinjuku Prince Hotel Collaboration Menu

The Shinjuku Prince Hotel is offering two types of collaborations: afternoon tea and food & drinks.

Collaboration Afternoon Tea

Served at the Japanese-style dining & bar FUGA (25F). Under the theme “An Afternoon in the Demon Realm Social Scene,” the menu features sweets and savory items incorporating character motifs and Halloween-inspired elements.

©Nishi Osamu (Akita Shoten)/”Demon Slayer: Iruma-kun” Season 4 Production Committee

Collaboration Pizza, Pasta & Character Drinks

Served at The Station Café Bar (B1). According to the official announcement, the story is set with Babyls teacher Naberius Karuiego, a teacher from Babyls, is overseeing the kitchen for a limited time.

©Nishi Osamu (Akita Shoten)/”The Devil Is a Part-Timer!” Season 4 Production Committee

The drink lineup differs between the Shinjuku location (5 varieties) and the Kawagoe location (4 varieties).

* Prices at “The Station Café Bar” include consumption tax. Prices at “Japanese-Style Dining & Bar FUGA (Fuga)” prices include consumption tax. A service charge (13%) will be added separately at the time of payment.

Iruma-kun × Prince Hotel Promotional Items

There are three types of promotional items you can receive when ordering from the restaurant menu. The items vary depending on what you order.

© Osamu Nishi (Akita Shoten)/”Demon Slayer! Iruma-kun” Season 4 Production Committee

With our lodging plans, each guest may take home one set of original promotional items.

*Please note that these promotional items cannot be exchanged. (In the event of any defects or issues, we will exchange the item for one of the same design.) *Distribution of these gifts will end once the planned quantity has been exhausted. *Reselling these gifts to third parties is strictly prohibited under any circumstances.

The “Iruma-kun × Prince Hotel” event starts on September 1!

Iruma-kun × Prince Hotel FAQs

When and where will it be held?

It will be held from September 1 to October 31, 2026, at two locations: the Shinjuku Prince Hotel and the Kawagoe Prince Hotel.

Reservations opened on June 25, 2026, at 12:00 PM.

Do the events differ between the two hotels?

Yes, they do. Shinjuku features an “Infernal Hotel” theme, offering an immersive room stay package, afternoon tea, pizza, pasta, and drinks.

Kawagoe features a “Music Festival” theme, offering a concept-themed room, pancakes, and drinks.

How much do the stay packages cost?

Prices start at 19,256 yen per person in Shinjuku and 10,500 yen per person in Kawagoe (both based on double occupancy).

The price includes one night’s room rate, consumption tax, service charge, and original merchandise.

Will I receive any promotional items?

Yes. The accommodation plan includes a clear pouch with the logo, a character acrylic stand, and an original key card.

Depending on what you order from the restaurant menu, you’ll receive either a coaster, a postcard, or a clear card.

Are there any benefits exclusive to guests?

Yes.

Hotel guests can exclusively listen to newly recorded voice clips by Suzuki Iruma.

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Please check the official website for details.
*Please note that the information in this article may be outdated; we apologize for the inconvenience, but please check the official website for the latest details.

© Osamu Nishi (Akita Shoten)/”Demon Slayer: Iruma-kun” Season 4 Production Committee