Detective ConanCase Closed!A6 Original Size
- 2026 New
- ON SALE FEB 1
- JAPAN ONLY
This product is available for shipment within Japan only.
International shipping is not available.
This collaboration brings the world of Detective Conan, the popular mystery manga serialized in Weekly Shonen Sunday, to the Hobonichi Techo.
Write down the day’s events, and the moment you fasten the cover’s button... “Case Closed!” Designed with a classical look inspired by the British detective attire that Conan admires, this cover is ready for your cases, romance, and memories. It’s a “Life Book” just for you, to spend every day with. 
The cover is a trifold type that closes with a snap button. It features a retro British-style plaid pattern and a commemorative name tag logo representing the collaboration between Detective Conan and the Hobonichi Techo. 
The pen hook inside the cover is designed to hold a pen by its clip. 
Inside the cover, numerous famous scenes selected from Detective Conan are lined up. The two bookmarks come in blue and red, inspired by Conan’s jacket and bow tie. 
There are even more original illustrations hidden in the sleeves where you insert the techo book. Be sure to take a peek to see what pictures are inside. 
We also created a pocket featuring the familiar keyhole motif found on the back covers of the comics. If you insert your favorite card or photo, its face will peek out through the keyhole. 
The pocket features a quote that appears frequently in the original work, stamped in gold foil: “When you have eliminated the impossible, whatever remains, however improbable, must be the truth.” 
The Detective Conan lineup includes not only the techo but also stationery and accessories suitable for various scenes. Why not carry famous scenes from Detective Conan with you on items designed for daily use?
© Gosho Aoyama/Shogakukan
Staff List
- Photographer
- Styled Images: Nobuki Kawaharazaki / Product Detail: Hiroyuki Oe
- Stylist
- Haruka Kimura
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Specifications*Specifications may vary slightly
- Cover
Size H: 165 x W: 340 x T: 3 mm / H: 6.5" x W: 13.4" x T: 0.1" Weight Approx. 130 g Main material Exterior: Polyester, Polyurethane / Interior: PU, Polyester Compatible Techo Books 
Planner (A6)
1 page per day English edition
Original (A6)
1 page per day
Original Avec (A6)
1 page per day 6-month book
Day-Free
Monthly notebook
Planner | One-Page-Per-Day TypeEnglish
type Monday Start (English) Size A6
H: 148 x W: 105 x T: 15 mm /
H: 5.8" x W: 4.1" x T: 0.6"
*Specifications may vary slightlyWeight Approx. 190 g Dates Jan 2026 - Dec 2026 - The English-version daily techo with a refined design
- This compact A6 size techo has spacious daily pages and a simple graph-paper design that offers plenty of freedom to draw, paste, and write.
- Daily pages
- Yearly calendar
- Yearly index
- Monthly calendar
- Memo pages
Original | One-Page-Per-Day TypeStandard Edition (Japanese / English) / One Piece Edition (*1)
type Monday Start (Japanese)
Sunday Start (Japanese)
Monday Start (English)Size A6
H: 148 x W: 105 x T: 15 mm /
H: 5.8" x W: 4.1" x T: 0.6"
*Specifications may vary slightlyWeight Approx. 195 g Dates Jan 2026 - Dec 2026 (Jan start)
Apr 2026 - Mar 2027 (Apr start)- A classic easy-to-use techo
- This compact A6 size techo has spacious daily pages and a simple graph-paper design that offers plenty of freedom to draw, paste, and write.
- Daily pages
- Yearly calendar
- Yearly index
- Monthly calendar
- Memo pages
*1 Also compatible with the One Piece Edition Original Book.
Original Avec | One-Page-Per-Day Type (2-Book Set)Japanese
type Monday Start (Japanese) Size A6
Each Book: H: 148 x W: 105 x T: 8 mm /
H: 5.9" x W: 4.1" x T: 0.3"
*Specifications may vary slightlyWeight Each Book: Approx. 110 g Dates Book 1: Jan 2026 - June 2026
Book 2: July 2026 - Dec 2026- Each 6-month daily techo is thin and light for easy carry
- This techo splits the year into two 6-month books, making it easy to carry while keeping the same page design and layout as the standard edition.
- Daily pages
- Yearly calendar
- Yearly index
- Monthly calendar
- Memo pages
Day-Free | Monthly Techo + NotebookJapanese
type Monday Start (Japanese) Size A6
H: 148 x W: 105 x T: 8 mm /
W: 4.1" x H: 5.9" x T: 0.3"
*Specifications may vary slightlyWeight Approx. 110 g Dates Dec 2025 - Mar 2027 - A monthly notebook with undated pages to write freely
- This techo starts with monthly calendars and ends with undated graph paper pages so you can write whenever you want, and as much as you want.
- Monthly calendar
- Yearly calendar
- Yearly index
- Graph paper notebook pages
- Book (Original Japanese Edition / Japanese / April Start)
Size A6 size
H: 148 x W: 105 x T: 15 mm / H: 5.8" x W: 4.1" x T: 0.6"
*Actual book size may vary slightlyWeight Approx. 195 g Language Japanese Pages 464 pages Paper Type / Binding Thin, light Tomoe River paper that is smooth to write on and designed for planners / Stitch-binding Graph Paper Size 3.7 mm
*Monthly calendar pages are 3.45 mmStart of Week Monday-start week or Sunday-start week Yearly Calendar 2025, 2026, 2027 Yearly Index Feb. 2026 - May 2027 (8 pages) Monthly Calendar Feb. 2026 - May 2027 (32 pages) Daily Pages Apr. 1, 2026 - Mar. 31, 2027 (377 pages)
*A page is included at the beginning of each month to help in planning ahead.
*All daily pages include daily quotes.
*Includes a mini monthly calendar at the bottom right of every two-page spread (Monday- / Sunday-start).
*Additionally, 3 blank pages are featured at the beginning to provide a free area when starting out the book.Daily Quotes One per day (Japanese) Weekly Pages Not included Memo Pages 13 pages Bonus Pages Time Table / Graph Paper / Favorites / My 100 / Memories 2026 / 12 Switches to Help You Focus / For a Comfortable Night’s Sleep / Solar Terms / Emergency Preparedness / Conversion Chart / Getting the most of Hobonichi / Gifts / Age Table / Addresses / Personal Notes Listed Information Day of the year / Week of the year (listed on monthly calendars) / Old lunar calendar / Rokuyo (traditional Japanese lunisolar calendar) (listed on monthly calendars) / Solar terms / Japanese holidays / Moon phase (daily pages include every phase, monthly calendars only include full and new moon) Other See the Exploring Each Type page for more details
- Book (Original English Edition / English / January Start)
Size A6 size
H: 148 x W: 105 x T: 15 mm / H: 5.8" x W: 4.1" x T: 0.6"
*Actual book size may vary slightlyWeight Approx. 195 g Language English Pages 464 pages Paper Type / Binding Thin, light Tomoe River paper that is smooth to write on and designed for planners / Stitch-binding Graph Paper Size 3.7 mm
*Monthly calendar pages are 3.45 mmStart of Week Monday-start week Yearly Calendar 2025, 2026, 2027 Yearly Index Dec. 2025 - Mar. 2027 (8 pages) Monthly Calendar Dec. 2025 - Mar. 2027 (32 pages) Daily Pages Jan. 1 - Dec. 31, 2026 (377 pages)
*A page is included at the beginning of each month to help in planning ahead.
*Every two-page spread includes one daily quote.
*Includes a mini monthly calendar at the bottom right of every two-page spread (Monday-start).
*Additionally, a blank two-page spread is featured at the beginning to provide a free area when starting out the book.Daily Quotes One quote per two-page spread (English) Weekly Pages Not included Memo Pages 17 pages Bonus Pages Time Table / Graph Paper / Favorites / My 100 / Memories 2026 / 12 Switches to Help You Focus / For a Comfortable Night’s Sleep / Words to Remember / 365 Days Check-Off Sheet / Looking Back at the Year 2026 / Getting the Most Out of Your Hobonichi Techo / Gifts / Addresses / Personal Notes Listed Information Day of the year / Week of the year (listed on monthly calendars) / Moon phase (daily pages include every phase, monthly calendars only include full and new moon) Other See the Exploring Each Type page for more details
- Book (Planner / English / January Start)
Size A6 size
H: 148 x W: 105 x T: 15 mm / H: 5.8" x W: 4.1" x T: 0.6"
*Actual book size may vary slightlyWeight Approx. 190 g Language English Pages 448 pages Paper Type / Binding Thin, light Tomoe River paper that is smooth to write on and designed for planners / Stitch-binding Graph Paper Size 4 mm Start of Week Monday-start week Yearly Calendar 2026, 2027 Yearly Index Dec. 2025 - Mar. 2027 (8 pages) Monthly Calendar Dec. 2025 - Mar. 2027 (32 pages) Daily Pages Jan. 1 - Dec. 31, 2026 (377 pages)
*A page is included at the beginning of each month to help in planning ahead.
*Every two-page daily page spread includes one daily quote.
*Includes a mini monthly calendar at the bottom right of every two-page spread (Monday-start).
*Additionally, a blank two-page spread is featured at the beginning to provide a free area when starting out the book.Daily Quotes One quote per two-page spread (English) Weekly Pages Not included Memo Pages 14 pages Bonus Pages Important Contacts / International Size Charts / The Ultimate Packing List / My 100 / Memories 2026 / Mochi - Japan’s Favorite Sticky Treat / Shinkansen - Travel Japan on the Bullet Train / Personal Notes Listed Information Day of the year / Week of the year (listed on monthly calendars and daily pages) / Moon phase (daily pages include every phase, monthly calendars only include full and new moon) Other See the Exploring Each Type page for more details
- Book (Original / Japanese / January Start)
Size A6 size
H: 148 x W: 105 x T: 15 mm / H: 5.8" x W: 4.1" x T: 0.6"
*Actual book size may vary slightlyWeight Approx. 195 g Language Japanese Pages 464 pages Paper Type / Binding Thin, light Tomoe River paper that is smooth to write on and designed for planners / Stitch-binding Graph Paper Size 3.7 mm
*Monthly calendar pages are 3.45 mmStart of Week Monday-start week or Sunday-start week Yearly Calendar 2025, 2026, 2027 Yearly Index Dec. 2025 - Mar. 2027 (8 pages) Monthly Calendar Dec. 2025 - Mar. 2027 (32 pages) Daily Pages Jan. 1 - Dec. 31, 2026 (377 pages)
*A page is included at the beginning of each month to help in planning ahead.
*All daily pages include daily quotes.
*Includes a mini monthly calendar at the bottom right of every two-page spread (Monday- / Sunday-start).
*Additionally, a blank two-page spread is featured at the beginning to provide a free area when starting out the book.Daily Quotes One per day (Japanese) Weekly Pages Not included Memo Pages 15 pages Bonus Pages Time Table / Graph Paper / Favorites / My 100 / Memories 2026 / 12 Switches to Help You Focus / For a Comfortable Night’s Sleep / Solar Terms / Emergency Preparedness / Conversion Chart / Getting the most of Hobonichi / Gifts / Age Table / Addresses / Personal Notes Listed Information Day of the year / Week of the year (listed on monthly calendars) / Old lunar calendar / Rokuyo (traditional Japanese lunisolar calendar) (listed on monthly calendars) / Solar terms / Japanese holidays / Moon phase (daily pages include every phase, monthly calendars only include full and new moon) Other See the Exploring Each Type page for more details
- Book (Original Avec / Japanese / January Start / 2-Book Set)
Size A6 size x 2 books
Each Book: H: 148 x W: 105 x T: 8 mm / H: 5.9" x W: 4.1" x T: 0.3"
*Actual book size may vary slightlyWeight Each Book: Approx. 110 g Language Japanese Pages Each Book: 240 pages Paper Type / Binding Thin, light Tomoe River paper that is smooth to write on and designed for planners / Stitch-binding Graph Paper Size 3.7 mm
*Monthly calendar pages are 3.45 mmStart of Week Monday-start week Yearly Calendar 2025, 2026, 2027 Yearly Index Book 1: Dec. 2025 - Mar. 2027 (8 pages)
Book 2: Jun. 2026 - May 2027 (6 pages)Monthly Calendar Book 1: Dec. 2025 - Jul. 2026 (16 pages)
Book 2: Jun. 2026 - Jan. 2027 (16 pages)Daily Pages Book 1: Jan. 1 - June 30, 2026 (187 pages)
Book 2: July 1 - Dec. 31, 2026 (190 pages)
*A page is included at the beginning of each month to help in planning ahead.
*All daily pages include daily quotes.
*Includes a mini monthly calendar at the bottom right of every two-page spread (Monday-start).
*Additionally, a blank two-page spread (three pages for Book 2) is featured at the beginning to provide a free area when starting out the book.Daily Quotes One per day (Japanese) Weekly Pages Not included Memo Pages Book 1: 2 pages
Book 2: 0 pagesBonus Pages Time Table / Graph Paper / Favorites / My 100 / Memories 2026 / 12 Switches to Help You Focus / For a Comfortable Night’s Sleep / Solar Terms / Emergency Preparedness / Conversion Chart / Getting the most of Hobonichi / Gifts / Age Table / Addresses / Personal Notes Listed Information Day of the year / Week of the year (listed on monthly calendars) / Old lunar calendar / Rokuyo (traditional Japanese lunisolar calendar) (listed on monthly calendars) / Solar terms / Japanese holidays / Moon phase (daily pages include every phase, monthly calendars only include full and new moon) Other See the Exploring Each Type page for more details
- Book (Original - One Piece Edition / Japanese / January Start)
Size A6 size
H: 148 x W: 105 x T: 15 mm / H: 5.8" x W: 4.1" x T: 0.6"
*Actual book size may vary slightlyWeight Approx. 195 g Language Japanese Pages 464 pages Paper Type / Binding Thin, light Tomoe River paper that is smooth to write on and designed for planners / Stitch-binding Graph Paper Size 3.7 mm
*Monthly calendar pages are 3.45 mmStart of Week Monday-start week Yearly Calendar 2025, 2026, 2027 Yearly Index Dec. 2025 - Mar. 2027 (8 pages) Monthly Calendar Dec. 2025 - Mar. 2027 (32 pages) Daily Pages Jan. 1 - Dec. 31, 2026 (377 pages)
*A page is included at the beginning of each month to help in planning ahead.
*All daily pages include daily quotes.
*All daily pages include character names of those who celebrate their birthday that day (as of Vol.110)
*Additionally, a blank two-page spread is featured at the beginning to provide a free area when starting out the book.Daily Quotes One per day (Japanese / One Piece edition) Weekly Pages Not included Memo Pages 12 pages Bonus Pages One Piece Chronology / One Piece Trivia You’ll Want to Share Tomorrow / The Fluffy Animal Encyclopedia of One Piece / WANTED / Time Table / Favorites / My 100 / Solar Terms / Emergency Preparedness / Gifts / Age Table / Addresses / Personal Notes Listed Information Day of the year / Week of the year (listed on monthly calendars) / Old lunar calendar / Rokuyo (traditional Japanese lunisolar calendar) (listed on monthly calendars) / Solar terms / Japanese holidays / Moon phase (daily pages include every phase, monthly calendars only include full and new moon)
- Book (Day-Free A6 size / Japanese / Monthly)
Size A6 size
H: 148 x W: 105 x T: 8 mm / W: 4.1" x H: 5.9" x T: 0.3"
*Actual book size may vary slightlyWeight Approx. 110 g Language Japanese Pages 240 pages Paper Type / Binding Thin, light Tomoe River paper that is smooth to write on and designed for planners / Stitch-binding Graph Paper Size 3.7 mm
*Monthly calendar pages are 3.45 mmStart of Week Monday-start week Yearly Calendar 2025, 2026, 2027 Yearly Index Dec. 2025 - Mar. 2027 (8 pages) Monthly Calendar Dec. 2025 - Mar. 2027 (32 pages) Daily Quotes Included (Japanese) Graph Paper 171 pages Bonus Pages Time Table / Graph Paper / Favorites / My 100 / Memories 2026 / 12 Switches to Help You Focus / For a Comfortable Night’s Sleep / Solar Terms / Emergency Preparedness / Conversion Chart / Getting the Most of Hobonichi / Gifts / Age Table / Addresses / Personal Notes Listed Information Day of the year / Week of the year (listed on monthly calendars) / Old lunar calendar / Rokuyo (traditional Japanese lunisolar calendar) (listed on monthly calendars) / Solar terms / Japanese holidays / Moon phase (Full and new moon listed on monthly calendars) Other See the Exploring Each Type page for more details
User recommendations
If you’ve used any of these products, we welcome your notes on what you like about them or what led you to buy them so we can share it with customers who are currently considering these products. We’d also love to welcome comments from customers who purchased their techo outside the Hobonichi Store or received their book as a gift.
Please Read Before You Buy
We’ve compiled a list of warnings, potential issues, and tips to keep in mind for this particular product. Additionally, the color of the product may be slightly different in actuality than compared to how it appeared on a computer or smartphone screen.
- About the pen hook
The pen hook of this cover is designed to hold a pen by its clip.