Hobonichi Techo Notebook Cover – Detective Conan / Case Closed! – A6 Original / A5 Cousin

Bring the world of Detective Conan / Case Closed! to your everyday planning with this special collaboration notebook cover from Hobonichi.

Designed with a classic detective-inspired aesthetic, the cover combines sophisticated styling with playful details inspired by the iconic Japanese mystery series. Inside, you can discover memorable scenes and decorative elements from Detective Conan, making the cover enjoyable both as a practical everyday accessory and as a collectible for fans.

Special details such as keyhole-inspired pockets add to the detective theme. A favorite card or photograph can be placed inside to create a playful display through the keyhole motif.

Available in two sizes to match your Hobonichi Techo:

A6 – for Hobonichi Techo Original
A5 – for Hobonichi Techo Cousin

Choose the appropriate size for your planner from the available variants.

Perfect for Detective Conan fans, Hobonichi collectors, stationery enthusiasts, and anyone who wants to add a little mystery to their daily planning.

Key Features

• Official Hobonichi × Detective Conan / Case Closed! collaboration
• Available in A6 and A5
• A6 fits Hobonichi Techo Original
• A5 fits Hobonichi Techo Cousin
• Detective-inspired design
• Features artwork and memorable scenes from Detective Conan
• Decorative and functional interior pockets
• Special keyhole-motif details
• Convenient pen storage
• Combines everyday functionality with collectible character design
• Ideal for planning, journaling, and Detective Conan collectors
• Cover only – planner book is not included

Size Compatibility

A6 → Hobonichi Techo Original (A6)
A5 → Hobonichi Techo Cousin (A5)

Please make sure to select the correct size for your Hobonichi Techo before ordering.

Product Details

Brand: Hobonichi
Collaboration: Detective Conan / Case Closed!
Product Type: Planner / Notebook Cover
Available Sizes: A6 / A5
A6 Compatibility: Hobonichi Techo Original
A5 Compatibility: Hobonichi Techo Cousin
Material: Polyester, polyurethane / PU – may vary by part and size
Design: Detective Conan / Case Closed!