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19cm Wide Gusset Keeps Bento Flat! Japan-Exclusive “Bread Thief” Eco-Bag Debuts as Magazine Supplement

A special supplement is coming to the April 2026 issue of the popular Japanese lifestyle magazine Lettuce Club. This issue, sold exclusively at 7-Eleven stores across Japan and select online retailers, includes an eco-bag featuring “Onigiri-boya” (Rice Ball Boy), a companion to the popular picture book character “Pan-dorobou” (Bread Thief). Ahead of the official release on March 25, 2026, online pre-orders began on March 15.

Onigiri-boya plush charm and eco-bag set

Transforms into a Plush Charm! The Adorable “Onigiri-boya” Design

The star of this release is “Onigiri-boya,” a character from the hit Japanese picture book series Pan-dorobou. For those unfamiliar, “Onigiri” refers to a Japanese soul food—a rice ball shaped into a triangle or cylinder, often wrapped in seaweed.

The most unique feature of this bag is that when not in use, it can be folded and tucked away to become a cute “plush charm.” While most eco-bags look utilitarian when stored, this item can be attached to your main bag’s handle as a mascot. Onigiri-boya’s quirky expression is sure to bring a bit of comfort to your daily shopping trips.

Eco-bag folded into a cute plush charm

Perfect for Japanese “Konbini” Bento! A Carefully Calculated 19cm (7.5 inches) Gusset

This eco-bag is specifically designed for shopping at Japanese convenience stores, known locally as “Konbini.” It measures approximately 29.5 cm (11.6 inches) in height and 26 cm (10.2 inches) in width—a perfect size for use as a secondary bag.

Size comparison and usage of the eco-bag

The most practical feature is the “Gusset” (bottom width), which is an exceptionally wide 19 cm (7.5 inches). In Japan, convenience store bento boxes and pasta containers are often flat and wide; in standard eco-bags, these containers often tilt, causing the contents to spill or mess up.

Thanks to the wide gusset, this bag allows you to carry bento boxes or sushi packs perfectly flat and stable. Furthermore, it is designed to easily fit a size 5 whole cake box (approx. 15 cm or 5.9 inches in diameter). This functionality, allowing users to bring home their purchases in pristine condition, perfectly captures the needs of Japanese consumers.

Wide 19cm gusset holding a lunch box flat

How to Get It: Limited Sale via 7-Eleven and Official Online Stores

This special edition with the “Onigiri-boya Eco-Bag” is not included with the regular version of the magazine sold at general bookstores. It is a limited-edition item available only through the following channels:

  • Product Name: Lettuce Club April 2026 Issue, Seven Net Shopping / 7-Eleven Special Edition
  • Special Supplement: Pan-dorobou Onigiri-boya Eco-Bag (Transforms into a plush charm)
  • Bag Size: Approx. H 29.5 x W 26 x G 19 cm / 11.6 x 10.2 x 7.5 inches (excluding handles)
  • Japan Release Date: Wednesday, March 25, 2026
  • Price: 1,690 yen (Approx. $11.30 USD)
  • Retailers: Seven Net Shopping, 7-Eleven stores nationwide, and Kadost (KADOKAWA Official Online Store)

Please note that some stores may not carry the item, and release dates may vary by region. If you want to ensure you get one, pre-ordering through an online site is the most reliable method.

Lettuce Club April 2026 Issue Seven Net Shopping / Seven-Eleven Special Edition 🇯🇵

Upgrade Your Daily Shopping for More Comfort

This limited-edition eco-bag, which recreates the warm touch of the picture book world, is more than just character merchandise. Its practical design—aimed at carrying lunch boxes without tilting—is a symbol of the convenience-driven culture of Japan’s Konbini.

Every time you see the Onigiri-boya charm swinging from your bag, it’s bound to make a simple outing feel a bit more fun. If you spot it in-store or online, be sure to check out its adorable form and thoughtful usability for yourself.

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