Arts&Science: Baby Buffalo A6 Original Size - Techo Lineup

Arts&ScienceBaby BuffaloA6 Original Size

2025 New

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

An elegant and stylish red

We designed this cover to make a high-quality red techo stylish for adults to have.

The color is a sophisticated burgundy, with different red colors on the front and the inner cover. Bright red would also be nice, but this cover would be great for those who feel uncomfortable with such a color; it is bright and gorgeous on the inside but gives a calm impression on the outside.

As with all the Arts&Science techo, the simple but neat tabs and the beautiful curves of the pocket cutouts are all very carefully crafted details.

We believe this edition’s techo has become another stylish and attractive one.

Introduction to Baby Buffalo

(Hobonichi Techo 2025 lineup)

Staff List

Photographer: Styled Images: Mihoko Sakamoto / Product Detail: Hiroyuki Oe
Stylist: Ami Kanno

Arts&ScienceBaby BuffaloA6 Original Size

¥35,200 - ¥36,190(incl. tax)
¥33,000(incl. tax)

Normal

Available

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-FreeMonthly notebook

[Planner] Daily Pages (English Version)

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.

Monday-start
A6 size
Thickness: 15 mm (0.6”)

Daily pages
Yearly calendar
Yearly index
Monthly calendar
Memo pages

[Original] Daily Pages・One Piece Edition (*1)

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.

Monday-start
Sunday-start
A6 size
Thickness: 15 mm (0.6”)

Daily pages
Yearly calendar
Yearly index
Monthly calendar
Memo pages

*1 Also compatible with the One Piece Edition Original Book.

[Original Avec] Daily Pages (2-Book Set)

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.

Monday-start
A6 size
Thickness: 8 mm (0.3”) each

Daily pages
Yearly calendar
Yearly index
Monthly calendar
Memo pages

[Day-Free] Monthly Techo + Notebook

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.

Monday-start
A6 size
Thickness: 8 mm (0.3”)

Monthly calendar
Yearly calendar
Yearly index
Graph paper notebook pages

Specifications

Cover

Size	H: 161 x W: 323 x T: 3 mm / H: 6.3" x W: 12.7" x T: 0.1" *Specifications may vary slightly
Weight	Approx. 96 g
Main material	Exterior: Cow leather / Interior: Cow leather

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 slightly
Weight	Approx. 195 g
Language	English
Pages	464 pages
Paper Type / Binding	Thin, light Tomoe River paper resistant to bleeding and designed for planners / Stitch-binding
Graph Paper Size	3.7 mm *Monthly calendar pages are 3.45 mm
Start of Week	Monday-start week or Sunday-start week
Yearly Calendar	2024, 2025, 2026
Yearly Index	Dec. 2024 - Mar. 2026 (8 pages)
Monthly Calendar	Dec. 2024 - Mar. 2026 (32 pages)
Daily Pages	Jan. 1 - Dec. 31, 2025 (377 pages) A blank two-page spread is featured at the beginning to provide a free area when starting out the book. 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).
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 / Sample Symbols and Icons / How to Have Fun Keeping a Diary / Oodles of Noodles / Words to Remember / 365 Days Check-Off Sheet / Looking Back at the Year 2025 / 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 slightly
Weight	Approx. 190 g
Language	English
Pages	448 pages
Paper Type / Binding	Thin, light Tomoe River paper resistant to bleeding and designed for planners / Stitch-binding
Graph Paper Size	4 mm
Start of Week	Monday-start week
Yearly Calendar	2025, 2026
Yearly Index	Dec. 2024 - Mar. 2026 (8 pages)
Monthly Calendar	Dec. 2024 - Mar. 2026 (32 pages)
Daily Pages	Jan. 1 - Dec. 31, 2025 (377 pages) A blank two-page spread is featured at the beginning to provide a free area when starting out the book. 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).
Daily Quotes	One quote per two-page spread (English)
Weekly Pages	Not included
Memo Pages	16 pages
Bonus Pages	Important Contacts / International Size Charts / The Ultimate Packing List / My 100 / How to Have Fun Keeping a Diary / Oodles of Noodles / 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 slightly
Weight	Approx. 195 g
Language	Japanese
Pages	464 pages
Paper Type / Binding	Thin, light Tomoe River paper resistant to bleeding and designed for planners / Stitch-binding
Graph Paper Size	3.7 mm *Monthly calendar pages are 3.45 mm
Start of Week	Monday-start week or Sunday-start week
Yearly Calendar	2024, 2025, 2026
Yearly Index	Dec. 2024 - Mar. 2026 (8 pages)
Monthly Calendar	Dec. 2024 - Mar. 2026 (32 pages)
Daily Pages	Jan. 1 - Dec. 31, 2025 (377 pages) A blank two-page spread is featured at the beginning to provide a free area when starting out the book. 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).
Daily Quotes	One per day (Japanese)
Weekly Pages	Not included
Memo Pages	15 pages
Bonus Pages	Time Table / Graph Paper / Favorites / My 100 / Sample Symbols and Icons / How to Have Fun Keeping a Diary / Recommended Noodle List of 47 Prefectures / Solar Terms / Emergency Preparedness / Conversion Chart / Getting the most of Hobonichi / Gifts / Age Table / Addresses (for 6 people) / 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 slightly
Weight	Each Book: Approx. 110 g
Language	Japanese
Pages	Each Book: 240 pages
Paper Type / Binding	Thin, light Tomoe River paper resistant to bleeding and designed for planners / Stitch-binding
Graph Paper Size	3.7 mm *Monthly calendar pages are 3.45 mm
Start of Week	Monday-start week
Yearly Calendar	2024, 2025, 2026
Yearly Index	Book 1: Dec. 2024 - Mar. 2026 (8 pages) Book 2: Jun. 2025 - May 2026 (6 pages)
Monthly Calendar	Book 1: Dec. 2024 - Jul. 2025 (16 pages) Book 2: Jun. 2025 - Jan. 2026 (16 pages)
Daily Pages	Book 1: Jan. 1 - June 30, 2025 (187 pages) Book 2: July 1 - Dec. 31, 2025 (190 pages) 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. 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).
Daily Quotes	One per day (Japanese)
Weekly Pages	Not included
Memo Pages	Book 1: 2 page Book 2: 0 page
Bonus Pages	Time Table / Graph Paper / Favorites / My 100 / Sample Symbols and Icons / How to Have Fun Keeping a Diary / Recommended Noodle List of 47 Prefectures / Solar Terms / Emergency Preparedness / Conversion Chart / Getting the most of Hobonichi / Gifts / Age Table / Addresses (for 6 people) / 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: 5.9"" x W: 4.1"" x T: 0.6"" *Actual book size may vary slightly
Weight	Approx. 195 g
Language	Japanese
Pages	464 pages
Paper Type / Binding	Thin, light Tomoe River paper resistant to bleeding and designed for planners / Stitch-binding
Graph Paper Size	3.7 mm *Monthly calendar pages are 3.45 mm
Start of Week	Monday-start week
Yearly Calendar	2024, 2025, 2026
Yearly Index	Dec. 2024 - Mar. 2026 (8 pages)
Monthly Calendar	Dec. 2024 - Mar. 2026 (32 pages)
Daily Pages	Jan. 1 - Dec. 31, 2025 (377 pages) A blank two-page spread is featured at the beginning to provide a free area when starting out the book. 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.107)
Daily Quotes	One per day (Japanese / One Piece edition)
Weekly Pages	Not included
Memo Pages	14 pages
Bonus Pages	One Piece Chronology / Phrases from One Piece to use when it counts / Ten great scenes chosen by readers to read over and over again / WANTED / Timetable / Favorites / My 100 / Solar Terms / Emergency Preparedness / Gifts / Age Table / Addresses (for 6 people) / 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 slightly
Weight	Approx. 110 g
Language	Japanese
Pages	240 pages
Paper Type / Binding	Thin, light Tomoe River paper resistant to bleeding and designed for planners / Stitch-binding
Graph Paper Size	3.7 mm *Monthly calendar pages are 3.45 mm
Start of Week	Monday-start week
Yearly Calendar	2024, 2025, 2026
Yearly Index	Dec. 2024 - Mar. 2026 (8 pages)
Monthly Calendar	Dec. 2024 - Mar. 2026 (32 pages)
Daily Quotes	Included (Japanese)
Graph Paper	171 pages
Bonus Pages	Time Table / Graph Paper / Favorites / My 100 / Sample Symbols and Icons / How to Have Fun Keeping a Diary / Recommended Noodle List of 47 Prefectures / Solar Terms / Emergency Preparedness / Conversion Chart / Getting the most of Hobonichi / Gifts / Age Table / Addresses (for 6 people) / 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

Please Read Before You Buy

In order to provide you with the most satisfaction for your product, we've compiled a list of warnings, potential issues, and tips to keep in mind for this particular product. Please be sure to read this information carefully before placing your order.

Actual specifications may vary from listing: Each item is individually assembled and sewn by hand by a factory worker. Best efforts are made to ensure consistent sizes and specifications, but there may be slight differences.
Leather may contain visible wrinkles, scratches, stains, or vein marks.: This product uses delicate leather that accentuates the natural qualities of the material There may be unavoidable marks in the leather that occurred during the manufacturing process. There also may be original imperfections visible on the surface of the leather, such as wrinkles, scratches, stains, or vein marks. We ask for your understanding for these naturally-occurring characteristics of genuine leather, and hope you enjoy the material as these imperfections come to stand out less over time.
　　
Leather coloring stains: Dyed leather products tend to leave stains. Please be careful not to allow the leather to adhere or rub against other objects such as clothing or other belongings, especially if the bag is wet from water or sweat from your hands.
Avoid storing in hot and humid places: Please avoid storing your product in hot, humid places or placing it atop other objects for long periods of time as this may result in lower quality and color stains.

Pencil Board recommended during use: If you feel the metal fittings are in the way, we recommend writing over a pencil board.
About the surface finish: The pen body has been processed to have a matte finish. After prolonged use or strong rubbing with a cloth, the matte finish may fade and become glossy. The matte finish may also come off if it comes in contact with certain chemicals, such as alcohol.
Immediately dry if it gets wet: Immediately dab your product with a dry cloth if it gets wet. Avoid drying it with high temperatures, and place it in a well-ventilated place in the shade.

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.

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