This cover is produced by Arts&Science, a brand and shop led by Sonya Park, who is also the creative director of the Hobonichi Techo Planner.
The leather for this edition is fine and smooth buffalo leather. It is made by a “semi-chrome process,” combining the advantages of tannin for durability and chromium for flexibility. 
The cover is deep burgundy, and the inner cover is a brighter, vivid red. This allows you to enjoy the two different nuances when the techo is closed and when it is open. 
It is a trifold type with a magnet and a tab as an accent to the design, making it easy to open the techo. 
Inside the cover is a pocket where you can tuck in items you want to carry with your techo. The front is stamped with the logos of Arts&Science and Hobonichi. 
It also includes a hook that can hold a pen by its clip. 
The bookmark is kept simple and uses the same leather as the cover. 
The longer you use it, the more beautiful the luster becomes. We hope you enjoy the change over time. 
*How the leather ages will differ based on usage, time, and its environment.
*We also have the Planner, the full-English version of the book, directed by Sonya Park. It features an ingenious design, including bonus pages exclusive to the book. 
*This cover is also available as an Arts&Science exclusive kip leather (cowhide) with a paint finish.
The Hobonichi Techo leather covers are made with all-natural materials that have their own unique appearance. Every leather cover is a one-of-a-kind, all-natural product, so you can feel good knowing your cover is the only one like it in the world. Here are some of the unique characteristics you can expect to find.
- Markings that naturally occur during an animal’s life:
Wrinkles, veins, texture, and scratches
- Characteristics from the manufacturing process of natural leather:
Dark spots (occurs when components of the leather are exposed to iron in the air during the tanning and dyeing process)
About Arts&Science
Arts&Science is a store and brand headed by creative director Sonya Park. Launched in 2003, they now have stores in Tokyo, Kamakura, Kyoto, and Fukuoka under various concepts.
The stores feature a wide variety of items such as original clothing, home goods designed to make your time at home more fulfilling, everyday items, artist collections, and even in the field of food. The stores also occasionally host exhibitions and projects.
Arts&Science Website
Staff List
- Photographer
- Styled Images: Mihoko Sakamoto / Product Detail: Hiroyuki Oe
- Stylist
- Ami Kanno
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Specifications*Specifications may vary slightly
- Cover
Size H: 161 x W: 323 x T: 3 mm / H: 6.3" x W: 12.7" x T: 0.1" Weight Approx. 96 g Main material Exterior: Buffalo leather / Interior: Buffalo leather 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 2027 - Dec 2027 - 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 2027 - Dec 2027 (Jan start)
Apr 2027 - Mar 2028 (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 2027 - June 2027
Book 2: July 2027 - Dec 2027- 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 2026 - Mar 2028 - 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
User recommendationsSend a comment
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.
- Leather may contain preexisting wrinkles and marks
In order to allow customers the enjoyment of all-natural leather, the leather is processed in a way that retains its original feel. This may leave imperfections visible on the surface of the cover, such as wrinkles, scratches, stains, or vein marks.
Depending on the conditions in which the cover is used, natural oils of the leather may emerge and appear as stains. We ask for your understanding for these naturally-occurring characteristics of genuine leather.
- Each leather piece has a unique look
This product uses leather with a highly distinctive character. The appearance of the leather varies depending on which part of the hide is used, so each item will have a one-of-a-kind expression. Please note that the pattern or texture may differ from what is shown in the product images.
- Color transfer may occur due to friction, pressure, or moisture
Color may transfer to other items through friction or prolonged contact. This risk increases when the cover is exposed to water or sweat, so please take extra care when carrying it near clothing or other belongings.