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Kyohei SakaguchiField SkyA5 Cousin Size

    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.

    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. (Note: This service is no longer active)

    Staff List

    Photographer
    Styled Images: Jin Yamamoto / Product Detail: Hiroyuki Oe
    Stylist
    Reiko Ogino
    Kyohei SakaguchiField SkyA5 Cousin Size
    1. ¥8,910 - ¥10,560 (incl. tax)
    2. ¥5,390 (incl. tax)

    20 per item
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    Specifications*Specifications may vary slightly

    Cover
    SizeH: 228 x W: 337 x T: 3 mm / H: 9" x W: 13.3" x T: 0.1"
    *Excluding pen holders
    WeightApprox. 170 g
    Main materialExterior: 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

    typeMonday Start (Japanese)
    Monday Start (English)
    SizeA5
    H: 210 x W: 148 x T: 18 mm /
    H: 8.3" x W: 5.8" x T: 0.7"
    *Specifications may vary slightly
    WeightApprox. 445 g
    DatesJan 2027 - Dec 2027 (Jan start)
    Apr 2027 - Mar 2028 (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

    typeMonday Start (Japanese)
    SizeA5
    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
    WeightEach Book: Approx. 260 g
    DatesBook 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
    • Weekly pages
    • Memo pages

    View details on features and included content

    Day-Free | Monthly Techo + NotebookJapanese

    typeMonday Start (Japanese)
    SizeA5
    H: 210 x W: 148 x T: 8 mm /
    H: 8.3" x W: 5.8" x T: 0.3"
    *Specifications may vary slightly
    WeightApprox. 220 g
    DatesDec 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

    View details on features and included content

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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.