The unique Japanese convenience store “Lawson Store 100” is bringing back its hugely popular “Dekamori Challenge” this year. “Dekamori” is a Japanese term meaning “extra-large” or “mega-sized,” and as the name suggests, this popular event features an array of items, from bento boxes to desserts, all served in surprisingly massive portions.
For 14 days, from Tuesday, November 19th to Monday, December 2nd, 2025, stores across Japan will be stocked with products designed to satisfy hearty appetites, perfect for this time of year when cravings are at their peak.
Additionally, a fantastic “Buy One, Get One Free” campaign will run concurrently. This is a popular type of fair common in Japanese convenience stores, where purchasing an eligible item gets you a voucher printed on your receipt for a free item on your next visit.
The Dekamori Challenge: A Festival of Giant Food to Satisfy Your Stomach and Curiosity
During this campaign, a total of 17 different “Dekamori” items—including bento boxes, onigiri (rice balls), bread, and desserts—will be released over two weeks. The lineup is exciting, featuring items with increased content for the same price and fun, gigantic sweets.
For more details, you can check the official page at https://store100.lawson.co.jp/special/campaign/2025/dekamori-2511/.
Phase 1: From Wednesday, November 19th to Tuesday, November 25th, 2025
Giant Chicken Steak Bento (Butter Shoyu)
Price: 498 JPY (538 JPY with tax)
This bento features a significantly larger chicken steak than the regular version. The juicy chicken thigh, paired with an aromatic butter and soy sauce flavor, is incredibly appetizing and goes perfectly with rice. A truly satisfying meal.
Bakudan Onigiri with Grilled Beef
Price: 160 JPY (173 JPY with tax)
True to its name, “bakudan” (bomb), this onigiri is characterized by its large, round shape. It feels substantial in your hand and is generously filled with grilled beef seasoned with a sweet and savory sauce.
Triple Ham, Cheese & Egg Sandwich
Price: 257 JPY (278 JPY with tax)
An extra layer has been added to the popular ham, cheese, and egg sandwich. It’s a rich-tasting sandwich with an exquisite combination of ham and onion salad, cheddar cheese, and the classic Japanese egg salad.
Dekamori Pudding Crepe
Price: 208 JPY (225 JPY with tax)
So satisfyingly large, you’ll think “This is heavy!” the moment you pick it up. A rich, eggy pudding and whipped cream are carefully wrapped in sponge cake and a crepe. For anyone with a sweet tooth, this is a dessert with undeniable volume.
Garlic French Bread
Price: 138 JPY (149 JPY with tax)
A large French bread generously coated with appetizing garlic butter and baked to perfection. You can enhance its deliciousness by lightly toasting it at home, which brings out the fragrant garlic aroma even more.
Croquette & Minced Meat Cutlet Burger
Price: 158 JPY (171 JPY with tax)
This hearty burger features a double-decker of two Japanese fried food staples: a croquette and a menchi-katsu (minced meat cutlet). You can enjoy different textures and flavors with every bite.
Bite-sized Kabuki-age with Wasabi 89g
Price: 110 JPY (119 JPY with tax)
“Kabuki-age” is a type of traditional Japanese fried rice cracker. This version contains 50% more than the manufacturer’s standard product. The sharp, distinct spiciness of wasabi pairs addictively with the savory flavor of the cracker.
Korokara (Assorted Flavors)
5 pieces + 1 extra piece each・Price: 198 JPY (214 JPY with tax)
“Korokara” is Lawson Store 100’s popular fried chicken. During the campaign, you get a fantastic deal: 6 pieces for the price of the usual 5. You can choose from three flavors: Regular, Red (Spicy), and Cheese.
Phase 2: From Wednesday, November 26th to Tuesday, December 2nd, 2025
Bikkuri! Chicken Katsu Bento
Price: 498 JPY (538 JPY with tax)
Just as the name “Bikkuri!” (Surprise!) suggests, this bento box features a surprisingly large chicken cutlet on a bed of rice. The crispy coating and juicy chicken will definitely fill you up.
Bakudan Onigiri with a Whole Yakitori
Price: 155 JPY (167 JPY with tax)
This high-impact onigiri contains an entire skewer of yakitori (a Japanese grilled chicken skewer). The savory sauce and charcoal-grilled flavor soak beautifully into the rice.
Triple Teriyaki Chicken Sandwich
Price: 248 JPY (268 JPY with tax)
An even bigger version of the teriyaki chicken sandwich, a flavor popular worldwide. Enjoy the homemade chicken coated in a sweet and savory sauce, complemented by the crisp texture of cabbage. It’s packed with volume, but you’ll enjoy it to the last bite.
Dekamori Pudding
Price: 198 JPY (214 JPY with tax)
Unlike the silky-smooth puddings popular today, this one features a classic, slightly firm texture. The balance of rich egg flavor, gentle sweetness, and a bittersweet caramel sauce is exquisite. It’s a classic dessert perfect for indulging in by yourself or sharing with someone.
Butter-Flavored Boule
Price: 138 JPY (149 JPY with tax)
A large, fluffy, and impressive-looking bread. With its rich buttery aroma and gentle flavor, it’s perfect for breakfast or as a snack.
Dual Croquette Sandwich: Curry & Corn
Price: 198 JPY (214 JPY with tax)
Thick slices of bread are filled with two types of popular Japanese croquettes: a curry croquette and a sweet corn croquette. It’s a great value and a hearty meal, offering two flavors in one sandwich.
Mashi-Mashi Grilled Corn Senbei 50g
Price: 148 JPY (160 JPY with tax)
“Mashi-Mashi” is a slang term, mainly from ramen culture, meaning “extra-large” or “super-sized.” This product is a “Mashi-Mashi” version with 50% more content than the standard one. It’s a rice cracker that lets you fully enjoy the sweet and savory flavor of grilled corn.
The “Buy One, Get One Free” Fair: A Smart Way to Save
This is an extremely popular promotion among Japanese consumers. For every eligible item you purchase, a voucher for a free item is printed on your receipt. You can use this coupon on your next shopping trip to get another of the same item or a related product for free. It’s a system loved by many because it’s easy on the wallet and encourages repeat visits.
The campaign is divided into two periods, each with different eligible products and redemption windows. If you see this campaign during a visit to Japan, be sure to give it a try. Just don’t forget to take your receipt!
If you have the chance to visit Japan, stop by a local Lawson Store 100 to experience this unique and fun campaign. You’re sure to get a taste of the depth and enjoyment of Japanese convenience store culture.
