ROLLCAKE Inc. (Headquarters: Nihon Kaikan 5F, 18-6 Sakuragaoka-cho, Shibuya-ku, Tokyo; CEO: Tadashi Ishida), which develops and operates smartphone applications, will begin accepting subscriptions for the 'Monthly Letter' featuring the popular work 'Coji-Coji' by Momoko Sakura on its calendar subscription service 'Monthly Letter' starting Wednesday, April 1, 2026. Deliveries will begin with the May issue.

A letter from Coji-Coji will arrive in your mailbox every month 'Monthly Letter' is a subscription service that connects fans with what they love through a calendar-format letter that arrives every month from their favorite artists and characters.

Now, 'Coji-Coji' has newly joined Monthly Letter. The letter arriving from Coji-Coji every month features a seasonal new illustration and calendar on the front, and a message from Coji-Coji on the back. By decorating your room with the letter that arrived in your mailbox, Coji-Coji naturally blends into your daily life, creating an experience where your 'favorites' continue as a part of your everyday routine.

Message from Coji-Coji On the back is a message from Coji-Coji. What kind of message it is will be a fun surprise until it arrives.

Monthly Letter Service Overview Monthly Coji-Coji Letter: - Subscription start: Wednesday, April 1, 2026 - Delivery start: From the May 2026 issue - Price: 385 yen per month (tax included) *First month trial price 165 yen (tax included) - What arrives: - Front = New Coji-Coji illustration × Calendar - Back = Message from Coji-Coji - Size: 19.4cm × 9.7cm - Paper: Premium thick paper, Vent Nouveau - Delivery: Regular mail / Delivered late every month - Packaging: Clear OPP envelope

Monthly Coji-Coji Letter Subscription Page https://gekkan-letter.jp/@cojicoji

FACT BOX

  • Source: PR TIMES
  • Category: New Product