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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・The event runs from September 1 to October 31, 2026, at two locations: Shinjuku and Kawagoe.
・The themes differ by location: “Demon World Hotel” in Shinjuku and “Music Festival” in Kawagoe
・Special accommodation packages for themed rooms and restaurant menus will be available
・Hotel guests will have exclusive access to newly recorded voice messages from Iruma Suzuki
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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.”
© Osamu Nishi (Akita Shoten)/”Iruma-kun” Season 4 Production Committee
| Shinjuku Prince Hotel | Theme: Demon World Hotel A dark and mysterious atmosphere inspired by the demon school Babylus Accommodation Plans/Afternoon Tea/Pasta/Pizza/Drinks |
|---|---|
| Kawagoe Prince Hotel | Theme: Music Festival A vibrant and lively atmosphere themed after the music festival in the series Stay Plans/Pancakes/Drinks |
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.
| 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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Iruma-kun × Kawagoe Prince Hotel Collaboration Menu
The collaboration menu will be served at the Kawagoe Prince Hotel’s Lobby Lounge (1F).
| 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.”
©Osamu Nishi (Akita Shoten)/”The Devil Is a Part-Timer! Iruma-kun” Season 4 Production Committee
©Osamu Nishi (Akita Shoten)/”The Devil Is a Part-Timer! Iruma-kun” Season 4 Production Committee
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.
| Rate | Starting at 19,256 yen per person (based on 2 guests per room) |
|---|---|
| Room Type | Immersive Room |
| Inclusions | 1 night’s stay, plan-exclusive giveaways (Clear pouch with logo, 3 types of character acrylic stands, original key card) |
| Reservations | Accommodation Plan Reservation Page/03-3205-1111 |
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.
Afternoon Tea
Sweets
©Nishi Osamu (Akita Shoten)/”Demon Slayer: Iruma-kun” Season 4 Production Committee
| Location | Japanese-Style Dining & Bar FUGA (Fuga) (25F) |
|---|---|
| Time | 2:30 P.M. – 5:00 P.M. (Last Order: 4:30 P.M.) |
| Price | Weekdays: 6,500 yen / Saturdays, Sundays, and Holidays: 7,000 yen |
| Details | 3-tier stand (top tier: 3 types of sweets / middle tier: 3 types of sweets / bottom tier: 4 types of savory items) ▸ Plan-exclusive gift (clear cards), 5 cards per set |
| Reservations | Afternoon Tea Reservation Page |
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.
Collaboration Food
Collaboration Drinks
©Nishi Osamu (Akita Shoten)/”The Devil Is a Part-Timer!” Season 4 Production Committee
| ① | Royal Ruby Pizza Dedicated to Lord Iruma |
|---|---|
| ② | Iruma-kun’s “Kindness” Cream Pasta |
| ③ | With Reverence: Kurego’s Black Silk Pasta |
| ④ | Clara’s Toitoi★Dream Pizza |
| Bonus | ▸ Plan-Exclusive Giveaway (Postcard with Original Illustration) |
| Lineup | ⑤Iruma Suzuki / ⑥Asmodeus Alice / ⑦Varac Clara / ⑧Opera / ⑨Naberius Karego |
|---|---|
| Special Offers | ▸ Plan-Exclusive Giveaway (Coaster) |
| Location & Hours | The Station Café Bar (B1)/10:00 A.M. – 10:00 P.M. (Last Order 9:30 P.M.) |
| Reservations | Café Bar Menu Page |
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.
Coasters
Postcard
Clear Card
© Osamu Nishi (Akita Shoten)/”Demon Slayer! Iruma-kun” Season 4 Production Committee
| Original Coaster | One (random) with the purchase of a collaboration drink |
|---|---|
| Original Postcard | 1 per order of pancakes or collaboration food |
| Original Clear Card | 1 set of 5 varieties with the purchase of a Pancake & Drink Set or Afternoon Tea |
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!
©Osamu Nishi (Akita Shoten)/”The Devil Is a Part-Timer! Iruma-kun” Season 4 Production Committee
| Official Website | Kawagoe Prince Hotel Special Page Shinjuku Prince Hotel Special Page Press Release |
|---|---|
| Event Dates and Venues | [September 1, 2026 – October 31, 2026] Kawagoe Prince Hotel (1-22 Shintomi-cho, Kawagoe City, Saitama Prefecture) |
| Event Dates and Venue | [September 1, 2026 – October 31, 2026] Shinjuku Prince Hotel (1-30-1 Kabukicho, Shinjuku-ku, Tokyo) |
| Theme | Shinjuku: Demon World Hotel / Kawagoe: Music Festival |
| Accommodation Plans | Shinjuku: Starting at 19,256 yen per person / Kawagoe: Starting at 10,500 yen per person (both based on double occupancy) |
| Restaurants | Shinjuku: Afternoon tea starting at 6,500 yen, food 2, 200 yen, Drinks 1,300 yen Kawagoe: Pancakes 1,500 yen, Drinks 1,300 yen, Set 2,500 yen |
| Reservations Open | Starting at 12:00 PM on June 25, 2026 |
| Inquiries | Shinjuku: Accommodations 03-3205-1111 / Restaurant 03-3205-1124 Kawagoe: Accommodations 04 9-227-1118 / Restaurant 049-227-1132 |
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
