7-Eleven Japan, the country’s largest “Konbini” (convenience store) chain, has launched an X (formerly Twitter) campaign in collaboration with the globally popular mystery anime “Detective Conan” (Case Closed) starting April 10, 2026. In this campaign, 50 lucky winners who correctly solve a “Nazotoki” (riddle) will receive a limited-edition “Conan & The Culprit Reversible Cushion Pillow” featuring iconic character designs.
A Must-Have for Fans! An Exclusive Item Where “The Culprit” Takes Center Stage
The prize for this campaign is a unique item that is already generating buzz among fans. It is a reversible cushion pillow featuring the protagonist of the national Japanese anime “Detective Conan,” Conan Edogawa, on one side, and the infamous “Shadow Man” (the culprit representation before their identity is revealed) on the other.
In Japan, “The Culprit” (Hannin) is such a beloved and unique character that it even has its own spin-off series. Its eerie yet somewhat humorous silhouette stands in stark contrast to Conan’s sharp and heroic appearance. With this playful design, you can choose which side to display based on your mood. This is a perfect example of the high-quality, creative limited-edition merchandise typical of Japanese convenience stores.
Join the “Nazotoki” Challenge: How to Enter
This campaign is more than just a simple “follow and repost.” To be eligible, participants must take on a “Nazotoki” challenge—a popular Japanese trend involving intellectual puzzles and riddles—and post the correct answer. It’s designed to let fans immerse themselves in the world of Detective Conan while they apply.
The entry process consists of the following three steps:
Step 1: Follow the Official Account
First, follow the @711SEJ 🇯🇵 , which provides the latest updates on information within Japan.
Step 2: Post the Riddle Answer
During the campaign period, solve the riddle presented in the target post. Enter your answer and post it to X.
Step 3: Wait for the Winner Notification
Only those who provide the correct answer will be entered into the lottery. Multiple entries are allowed, but each person (account) can only win once.
Campaign Period and Winner Announcement Schedule
The entry period lasts for about one month, covering “Golden Week,” a major series of national holidays in Japan.
- Campaign Period: Friday, April 10, 2026, to Saturday, May 9, 2026, 23:59 (JST)
- Number of Winners: 50 people total across Japan
- Prize: Conan & The Culprit Reversible Cushion Pillow
Winners are scheduled to be contacted via Direct Message (DM) from the @711SEJ 🇯🇵 between late May and early June 2026. Prizes are expected to be shipped after late June 2026 to addresses within Japan.
This is a fantastic chance to win exclusive merchandise while enjoying the mystery-filled world of Detective Conan. Be sure to check the official X account and test your deductive reasoning!
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