Burger King Japan brings back the Mushroom Whopper on Friday, September 18, 2026, in three sizes — regular, Double and Jr. Each one stacks four mushrooms (two roasted varieties plus eringi and bunashimeji) over a flame-grilled 100% beef patty, finished with a Premium Pepper Mayo Sauce. An app-only coupon runs through October 1, cutting 300 yen off the regular and Double sets, up to 23% off. An Autumn Icon Returns for a Limited Time BK Japan Co., Ltd. (headquarters: Chiyoda-ku, Tokyo; President & CEO Kazuhiro Nomura), operator of Burger King® in Japan, will bring back its beloved autumn classic, the Mushroom Whopper® line-up, from Friday, September 18, 2026, for a limited time. Three items are available: the Mushroom Whopper®, the Double Mushroom Whopper®, and the Mushroom Whopper® Jr. For many fans, this burger has become the signal that autumn has truly arrived. Four Kinds of Mushrooms and a

Jonathan holds its Kanpai Jonathan Fest from September 24 to October 7, 2026, with coupons covering 11 items. Four alcoholic drinks — Suntory The Premium Malt’s draft, Kaku Highball and red or white decanter wine — are half price with no limit on servings, while seven snacks including moon-viewing dishes take 110 yen off. Coupons work all day from 10:30 a.m., dine-in only. Jonathan’s ‘Kanpai Jonathan Fest’ Starts September 24 Jonathan, the family restaurant chain operated by Skylark Restaurants (part of the Skylark Group), will hold a 14-day coupon campaign called “Kanpai Jonathan Fest” from Thursday, September 24 to Wednesday, October 7, 2026. A total of 11 items are covered, and the coupons can be used all day from 10:30 a.m., making them handy for everything from a daytime drink to a relaxed evening in autumn. Because the campaign overlaps with Japan’s Jugoya harvest moon, the lineup includes

MOS Burger’s Kuro Ajillo Cheeseburger goes on sale October 1, 2026 at all 80 stores in Chiba and Ibaraki Prefectures for 630 yen including tax. The sauce builds on Chiba-produced soy sauce simmered with Chiba-raised pork bacon, mushrooms, zucchini and basil. Sales run to mid-November in limited quantities, tied to the Chiba Soy Sauce Gourmet Fair 2026. MOS Burger Joins the Chiba Soy Sauce Gourmet Fair 2026 for a Second Year MOS Food Services, Inc. (President: Eisuke Nakamura; Head Office: Shinagawa-ku, Tokyo), operator of the MOS Burger chain, will launch the “Kuro Ajillo Cheeseburger” (630 yen) on Thursday, October 1, 2026 at all 80 MOS Burger locations in Chiba and Ibaraki Prefectures, as a limited-quantity, region-exclusive item. Packed with Chiba-grown ingredients such as soy sauce and bacon, the burger also marks the company’s participation in the “Chiba Soy Sauce Gourmet Fair 2026,” which begins on the same day.

Skylark Group hands out its Autumn Food Tour coupon book at restaurants nationwide from September 17 to 30, 2026, covering 78 deals across 20 brands — or 58 coupons across 14 brands outside the Kanto area. The coupons can be used from October 1 through November 30. Sukesan Udon joins for the first time, and Gusto’s Cheese-in Hamburg Steak gets 25% off. Skylark Group Rolls Out Its “Autumn Food Tour Coupons” Skylark Restaurants Co., Ltd. (headquartered in Musashino City, Tokyo; President Takashi Nakajima), together with NILAX Inc., FLO JAPON Inc., Tomato & Associates Inc. and Sukesan Inc., will distribute a coupon book packed with 78 deals across 20 brands including Gusto, Bamiyan and Sukesan Udon. The “Autumn Food Tour Coupons” book will be handed out at Skylark Group restaurants nationwide starting Thursday, September 17, 2026. Contents vary by region. Three Highlights of the Campaign All 20 Skylark Group

Gusto’s Delicious Autumn Colors Fair runs from September 17 to October 21, 2026, bringing fried oyster sets, a tsukimi cheese-filled hamburg and mushroom duxelles pasta to the menu. Six Shine Muscat sweets join the lineup for the first time, including a parfait layered with six domestic grapes. Skylark app members can also grab generation-specific coupons worth up to 300 yen off through September 30. Gusto Kicks Off Its Delicious Autumn Colors Fair on September 17 Gusto, the family restaurant chain operated by Skylark Restaurants under Skylark Holdings, will launch its Delicious Autumn Colors Fair on Thursday, September 17, 2026. Fried oysters, tsukimi (moon-viewing) dishes and rich duxelles mushroom sauce plates line up for a menu three generations can enjoy together. The same day also marks the debut of Gusto’s first-ever sweets made with Shine Muscat grapes. Fair Overview Locations: All Gusto restaurants (availability varies by store) Period: Thursday,