A collaboration between Case Closed, the beloved detective manga serialized in Weekly Shonen Sunday, and Hobonichi Techo brings special planners and stationery for the April-start "Hobonichi Techo 2026 spring" edition. The collection features special edition weeks (weekly planner) with over 300 original illustrations, plus planner covers and stationery items that let you spend every day with Conan and friends. Sales begin February 1st (Sunday), 2026.
©Gosho Aoyama/Shogakukan
Hobonichi Techo 2026 spring
Release date: February 1st, 2026 (Sunday) at 11:00 AM
Sales locations: Hobonichi Online Store, TOBICHI (Tokyo and Kyoto), Loft stores nationwide, Rakuten Market, Amazon, and more.
*Release times and available products vary by store.
Case Closed Special Edition "weeks" Weekly Planner Featuring Original Illustrations Throughout
Main Weekly Pages Feature Case Closed Original Illustrations on Every Page
While maintaining the user-friendly design of the Hobonichi Techo weeks, Case Closed original illustrations appear on every page. Occasionally, Hobonichi Techo's "daily words" are replaced with character dialogue or words selected by Aoyama-sensei for a special touch!
Monthly Calendar Spotlighting Different Characters Each Month
The monthly calendar covering March 2026 to April 2027 features a different character spotlight each month. Panels showcasing various character expressions were selected from 107 volumes of the comic series.
Special Case Closed Themed Bonus Pages
The appendix includes plenty of bonus pages based on Case Closed illustrations and episodes that you can enjoy year-round.
Seven unique features exclusive to this planner include "Detective Tips That May Come in Handy Someday," "The Target of Desire," and "Cipher Charts for Planners."
Two Cover Designs to Choose From Based on Your Preferences and Occasion!
"Memorial Conan" features a gorgeous color illustration on the cover with Conan at the center surrounded by Case Closed characters. The commemorative group illustration created for the 100th volume release is printed on a canvas-textured material.
"Conan Motif" uses tie fabric and features a blue weeks design inspired by the jacket Conan wears. Items symbolic of the Case Closed universe are expressed through the tie fabric's weave. Using actual tie fabric provides a pleasant woven texture and silky luster.
The Case Closed series weeks includes a bookmark modeled after the "wristwatch anesthetic gun." The collaboration-exclusive design features a transparent window imagining the watch cover, allowing you to see through to the other side.
Classical Design Cover Inspired by the British Master Detective's Attire
This classically designed cover is inspired by the attire of the British master detective that Conan admires. The interior features numerous memorable scenes from Case Closed. Additionally, a pocket modeled after the familiar keyhole from the comic's back covers is included. Insert your favorite card or photo to have them peek through the keyhole.
Stationery to Spend Every Day with Conan and Friends Also Available!
Plenty of stationery items to use with your planner have been created. Seven items total include clear stamps and stickers perfect for planner decoration, and stappo for storing lots of stationery.
About Hobonichi Techo
Born from the website "Hobo Nikkan Itoi Shinbun (now Hobonichi)," the Hobonichi Techo celebrates its 25th year with the 2026 edition, marking it as a long-selling product. As a "LIFE BOOK" that can be freely and expansively used to match personal preferences and lifestyles, it has gained popularity worldwide across languages and cultures. The 2025 edition sold 960,000 copies across over 100 countries and territories globally. In Japan, it has recorded the top-selling planner ranking at Loft stores nationwide for 21 consecutive years.
Starting with the one-page-per-day A6 size "Original," various types now exist including the A5 size "Cousin," weekly planner "weeks," "Hobonichi 5-Year Techo," and cover-free "HON." It's also popular for its meticulously designed details and the many new designs released each year.
Hobonichi Techo Official Website
Hobonichi Co., Ltd.
Hobonichi is a company that creates "places" where people gather and plans, edits, produces, and sells content providing "good times." While delivering various readings through the website "Hobo Nikkan Itoi Shinbun (now Hobonichi)" launched in June 1998, the company has planned and sold various products including "Hobonichi Techo" and "Hobonichi Earth Ball" for customers gathering there. Other developments include the shopping-centered event "Exhibition of Life's Pleasures," video service "Hobonichi School," and the pet social media app "Dokonoko," expanding various "places" and content.
Corporate Website
https://www.hobonichi.co.jp/
