ONE PIECE Grand Gourmet Kairosoft Guide: Developer, Gameplay, and Release Details

ONE PIECE Grand Gourmet Kairosoft is one of the stranger pairings in recent simulation gaming. The ONE PIECE Grand Gourmet Kairosoft project teams Bandai Namco Entertainment Inc. with Kairosoft Co., Ltd., the studio behind a long line of small-scale management sims, for a restaurant game set on the seas of ONE PIECE. That combination matters because it tells you what to expect: not an action brawler, but a menu-driven, decorate-and-upgrade sim where the Straw Hat crew works the floor beside you.

The details are scattered across a Steam listing, a publisher announcement, and two trailers, so here is the verified picture as of October 21, 2026 — who is making the game, what a rookie staff member actually does, and how the release schedule lines up.

The ONE PIECE Grand Gourmet Kairosoft Connection

The Steam store page settles the credits question quickly: Kairosoft Co., Ltd. is listed as the developer, and Bandai Namco Entertainment Inc. is listed as the publisher. Steam also tags the title as Casual and Simulation, which matches everything the trailers show.

That split of responsibilities explains a lot about the ONE PIECE Grand Gourmet Kairosoft collaboration. Bandai Namco brings the license and the release machinery; Kairosoft builds the systems underneath — ingredient mixing, menu building, layout and decoration, and the fan-base progression that ties them together.

Steam describes the game as a restaurant management sim where you work alongside the Straw Hat Crew to build the greatest floating restaurant of the seas. If you have spent time in a Kairosoft management sim before, the shape of that promise should feel familiar: small decisions stacked over time, feeding a number that keeps growing.

What a Rookie Staff Member Does at Baratie Number Two

The second trailer lays out the premise. An impostor restaurant using the Baratie name starts serving overpriced food, and the damage to the original's reputation is severe. Luffy and Sanji respond by opening Baratie Number Two, and you join as the newest hire.

Your duties break down into a few repeating tasks:

• Develop dishes with Sanji by mixing and matching ingredients and recipes.
• Plate finished food and add decorations to build one-of-a-kind set menus.
• Serve those sets to waiting customers, including familiar faces from the series.
• Rearrange furniture and layout to change the mood around each table.
• Hunt for ingredients and expand the restaurant across more of the seas.

Steam's feature list marks the game as Single-player, with Steam Achievements, Steam Cloud, and Family Sharing support. Nothing in the store listing or either trailer describes a cooperative mode, so plan on running the restaurant solo.

Cooking With Sanji, Devil Fruit Twists, and Set Menus

The ONE PIECE Grand Gourmet Kairosoft cooking loop is more about combinations than reflexes. You choose ingredients, follow a character's idea, and work with Sanji to turn the result into a finished dish. Devil Fruit users occasionally lend a hand, which is how the game justifies recipes that would never exist in a normal kitchen.

Steam names two examples pulled from the series: Water-Water Meat BBQ and Sea King Penne Gorgonzola. Beyond those, the pitch is exploration — the more you cook and travel, the more recipes you uncover.

Plating is a second step. Once a dish is finished, you pair it with decorations to create a set menu, and presentation shapes how guests respond. The first trailer frames it as a chain reaction: the right food plus the right decor brings customers back for more.

Decorating Your Restaurant: 200+ Furniture Pieces, 400+ Characters

Customization is the other half of the loop, and it is where the ONE PIECE Grand Gourmet Kairosoft design layer does most of its work. You place tables first, then arrange furniture nearby to make the space feel cozier. Different pieces create different moods around a table, and mood shapes who wants to sit there.

The catalog is large. Steam and the publisher's release announcement both cite more than 200 furniture, building, and decorative items, including dessert-themed pieces inspired by Whole Cake Island and futuristic items from Egghead. The trailers show the same range at street level, with lamps and sofas that wink at specific islands.

Characters are the payoff. The trailers promise more than 400 characters, distributed unevenly across locations — who you meet depends on where your restaurant is. If a guest likes your food and your design, they can become a regular and keep visiting even as you sail to different seas. Customers can also open their own small shops inside your restaurant; the trailer's example is Hatchan running a takoyaki stand.

ONE PIECE Grand Gourmet Kairosoft Release Details (Dated Snapshot)

Release information for this game needs a date attached, because the sources do not all read the same way. Every ONE PIECE Grand Gourmet Kairosoft detail below is a snapshot taken on October 21, 2026, and should be checked against the live store page before you buy.

Steam's event notice listed Thursday, October 22, 2026 at 10:00 PM UTC, a timestamp that is already October 23 in Japan and much of Asia. That can explain Steam's calendar display, but the sources reviewed do not establish one synchronized launch moment across all platforms; Bandai Namco Entertainment Asia lists a platform split.

FAQ

What should I know about the ONE PIECE Grand Gourmet Kairosoft partnership? Kairosoft Co., Ltd. develops the game and Bandai Namco Entertainment Inc. publishes it, per the Steam listing observed on October 21, 2026. Steam files it under Casual and Simulation, and the trailers show a management loop built on cooking, plating, decoration, and fan-base growth rather than combat.

When does the game come out? As of October 21, 2026, Steam listed a release date of October 22, 2026, while the announcement trailer and the publisher's Asia announcement point to October 23 for the PC version. Steam's launch notice times the unlock at 10:00 PM UTC on October 22, which is October 23 in Japan.

Is there multiplayer or co-op? The Steam feature list captured on October 21, 2026 shows Single-player only, alongside achievements, cloud saves, and family sharing. Neither trailer describes a cooperative mode.

How much does it cost? As of October 21, 2026, the Steam store page listed a pre-purchase price of $19.99 in USD, with VAT included where applicable. Regional pricing and promotions change, so confirm the number on the store page before checkout.