Kyohei Sakaguchi: Field Sky A5 Cousin Size - Techo Lineup

Kyohei SakaguchiField SkyA5 Cousin Size

2026 New

He doesn’t construct buildings, yet he’s an architect. He writes, sings, photographs, and paints. Kyohei Sakaguchi has continued creating in all these forms—effortlessly, like breathing. This Hobonichi Techo cover features one of his pastel paintings.

Living in Kumamoto Prefecture, Sakaguchi began growing vegetables on a plot he rented in a community garden in 2020. On his way to the garden and while tending his plot, he captures the scenery with his smartphone. He uses these photos as references for his pastel artwork.

This picture, “Field Sky,” was drawn on October 17, 2021. The tall autumn sky glows pale blue, with dry air and white clouds swelling upward. The trees swaying in the wind, the strong, sprawling branches and leaves stretching into the vast sky—all radiate the vibrant force of nature.

In his essay “The Path to the Field,” featured in the artbook Pastel, Sakaguchi writes,

“Like brushing my teeth, washing my face, or taking a bath, I go to the field and draw with pastels.”

We hope that opening this techo will become just as naturally integrated into your daily life.

On the Cousin-size cover, the picture is laid out to fill the surface generously. The cool blue sky, white clouds, and deep green trees together tell the story of a sky over a fertile field.

Though almost photographic in its precision, a closer look reveals the powdery texture of the pastels—the gentle smudges and strokes made by hand give the piece a warm, tactile feel. To capture this texture, the artwork is printed on fine-grained, delicate polyester fabric.

The interior is made of white faux leather, resembling the paper used for pastel drawings. The bookmark is a soft, cool gray to complement the overall tone.

A portion of the picture is also printed onto the butterfly-stopper pen holder.

Sakaguchi is someone who excels at continuing—whether it’s drawing, writing, or making music—but you get the sense he’d gently remind you: “Write when you feel like it. Don’t force it when you need a break. That’s perfectly okay.”

Look up, and there’s the sky. Look down, and there’s a drawing of the sky.
This cover carries the promise of bright, clear days ahead.

There’s also a notebook titled A Notebook to Help Me Remember, featuring another pastel work by Sakaguchi. It has the same cover design as the Weeks version. The horizontal A5 size includes light blue grid pages inspired by the color of the sky, printed on Tomoe River paper—the same as is used in Hobonichi Techo books.

We also recommend Pastel, an artbook featuring 126 of Sakaguchi’s works printed at actual size. The landscapes he captures through careful observation remain fresh no matter how many times you revisit them—a private gallery you can keep by your side.

About Kyohei Sakaguchi

Born in Kumamoto Prefecture in 1978. Graduated in 2001 from the Department of Architecture from Waseda University’s School of Science and Engineering. Participated in many fields, including writing, painting, music, and architecture. Publicly shared that he lives with bipolar disorder, and has been running a crisis line “Inocchi no Denwa” on his personal cell phone since 2012 to take calls from anyone contemplating suicide.

Introduction to the Kyohei Sakaguchi series products

(Hobonichi Techo 2026 lineup)

Staff List

Photographer: Styled Images: Jin Yamamoto / Product Detail: Hiroyuki Oe
Stylist: Reiko Ogino

Kyohei SakaguchiField SkyA5 Cousin Size

¥8,910 - ¥10,560 (incl. tax)
¥5,390 (incl. tax)

20 per item

Available

Normal

Specifications*Specifications may vary slightly

Cover

Size

H: 228 x W: 337 x T: 3 mm / H: 9" x W: 13.3" x T: 0.1"

Weight

Approx. 170 g

Main material

Exterior: Polyester / Interior: PU

Compatible Techo Books

Cousin (A5)
1 page per day
Cousin Avec (A5)
1 page per day 6-month book
Day-Free
Monthly notebook

Cousin | One-Page-Per-Day TypeJapanese / English

type	Monday Start (Japanese) Monday Start (English)
Size	A5 H: 210 x W: 148 x T: 18 mm / H: 8.3" x W: 5.8" x T: 0.7" *Specifications may vary slightly
Weight	Approx. 445 g
Dates	Jan 2026 - Dec 2026 (Jan start) Apr 2026 - Mar 2027 (Apr start)

A daily techo with lots of space to write

This A5-size techo provides ample space on each daily page. It’s great for keeping in one place at home or at work and you can use it to track your child’s growth or exchange with someone.

Daily pages
Yearly calendar
Yearly index
Monthly calendar
Weekly pages
Memo pages

View details on features and included content

Cousin Avec | One-Page-Per-Day Type (2-Book Set)Japanese

type	Monday Start (Japanese)
Size	A5 Each Book: H: 210 x W: 148 x T: 10 mm / H: 8.3" x W: 5.8" x T: 0.4" *Specifications may vary slightly
Weight	Each Book: Approx. 260 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
Weekly pages
Memo pages

View details on features and included content

Day-Free | Monthly Techo + NotebookJapanese

type	Monday Start (Japanese)
Size	A5 H: 210 x W: 148 x T: 8 mm / H: 8.3" x W: 5.8" x T: 0.3" *Specifications may vary slightly
Weight	Approx. 220 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

View details on features and included content

Book (Cousin English Edition / English / January Start)

Size	A5 size H: 210 x W: 148 x T: 18 mm / H: 8.3" x W: 5.8" x T: 0.7" *Actual book size may vary slightly
Weight	Approx. 445 g
Language	English
Pages	544 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
Start of Week	Monday-start week
Yearly Calendar	2025, 2026, 2027
Yearly Index	Jan. 2026 - Dec 2026 (4 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	Dec 29, 2025 - Jan 3, 2027 (106 pages)
Memo Pages	6 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 / 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 and weekly pages) / Moon phase (daily pages include every phase, monthly calendars and weekly pages only include full and new moon)
Other	See the Exploring Each Type page for more details

Book (Cousin / Japanese / January Start)

Size	A5 size H: 210 x W: 148 x T: 18 mm / H: 8.3" x W: 5.8" x T: 0.7" *Actual book size may vary slightly
Weight	Approx. 445 g
Language	Japanese
Pages	544 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
Start of Week	Monday-start week
Yearly Calendar	2025, 2026, 2027
Yearly Index	Jan. 2026 - Dec 2026 (4 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-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	Dec 29, 2025 - Jan 3, 2027 (106 pages)
Memo Pages	6 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 / Gifts / Age Table / Conversion Chart / Getting the most of Hobonichi / Addresses / Personal Notes
Listed Information	Day of the year / Week of the year (listed on monthly calendars and weekly pages) / 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 and weekly pages only include full and new moon)
Other	See the Exploring Each Type page for more details

Book (Cousin Avec / Japanese / January Start / 2-Book Set)

Size	A5 size x 2 books Each Book: H: 210 x W: 148 x T: 10 mm / H: 8.3" x W: 5.8" x T: 0.4" *Actual book size may vary slightly
Weight	Each Book: Approx. 260 g
Language	Japanese
Pages	Each Book: 288 pages
Paper Type / Binding	Thin, light Tomoe River paper that is smooth to write on and designed for planners / Stitch-binding
Start of Week	3.7 mm
Start of Week	Monday-start week
Yearly Calendar	2025, 2026, 2027
Yearly Index	Book 1: Jan. - Dec. 2026 (4 pages) Book 2: Jul. 2026 - Jun. 2027 (4 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 - Jun. 30, 2026 (187 pages) Book 2: Jul. 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	Book 1: Dec. 29, 2025 - Jul. 5, 2026 (54 pages) Book 2: Jun. 29, 2026 - Jan. 3, 2027 (54 pages)
Memo Pages	Book 1: 8 pages Book 2: 4 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 / Gifts / Age Table / Conversion Chart / Getting the most of Hobonichi / Addresses / Personal Notes
Listed Information	Day of the year / Week of the year (listed on monthly calendars and weekly pages) / 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 and weekly pages only include full and new moon)
Other	See the Exploring Each Type page for more details

Book (Day-Free A5 size / Japanese / Monthly)

Size	A5 size H: 210 x W: 148 x T: 8 mm / H: 8.3" x W: 5.8" x T: 0.3" *Actual book size may vary slightly
Weight	Approx. 220 g
Language	Japanese
Pages	224 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
Start of Week	Monday-start week
Yearly Calendar	2025, 2026, 2027
Yearly Index	Jan. - Dec. 2025 (4 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 / Gifts / Age Table / Conversion Chart / Getting the most of Hobonichi / 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

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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.

Cover may contain variations in stitching or loose lining: Due to the structure of the cover that opens flat 180 degrees, exterior stitching areas may appear puckered and lining material may be loose.

Pen holder fits pens up to 13.5 mm wide: The pen holder is designed to fit the 12.2 mm (0.48") diameter Jetstream pen offered as a free Hobonichi Store Exclusive Bonus. Pens with certain shapes and materials may be difficult to pull through the holder. The holder can fit pens up to 13.5 mm (0.53") in diameter.

Color and print may vary slightly: The cover's color and print pattern are created by dyeing or printing onto white fabric. While we take care to ensure consistency during production, slight variations in color or pattern may occur between individual items. This may also happen across a single cover, such as a pocket compared to the rest of the cover. Minor print blurring or uneven coloring may also be present. In addition, on rare occasions, there may be small black or white dots visible on the print. This is an unavoidable aspect of the manufacturing process.