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LeatherTS Basic - BlackA5 Cousin Size

    We created this black leather cover with graphic designer Taku Satoh, who is in charge of the Hobonichi Techo’s design direction.



    TS stands for the initials of Taku Satoh. Out of all the various Hobonichi Techo covers, this has been a staple in our lineup and has been a popular choice for over ten years.



    The fine texture of the matte cow leather is soft from the first time you use it and fits comfortably in your hands. The smooth feel as you hold it in your hands is another characteristic of this leather.







    The leather cover exudes an elegance with a black color that will suit any outfit. It makes it an ideal first-time leather cover and is also perfect for anyone who wants to own a standard leather cover that is simple, chic, and timeless.

    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 Taku Satoh

    Graphic Designer. Graduated from Tokyo University of The Arts in 1979, majoring in design, and completed his master’s degree in 1981. Joined Dentsu, Inc. before establishing the Taku Satoh Design Office in 1984. Created product designs and branding for Oishii Gyunyu milk, Lotte XYLITOL gum, and much more.



    Currently active across a broad spectrum of projects, including general direction for NHK Educational TV’s “Design-Ah” series and art direction for “Nihongo de Asobo.”
    Current director of design museum 21_21 DESIGN SIGHT in Tokyo.



    TSDO Website



    Interviews with Taku Satoh on Hobo Nikkan Itoi Shinbun:

    The standard black leather cover

    This long-selling black leather has appeared every year. The matte and excellent black leather was selected by graphic designer Taku Satoh, and it looks great just to have it with you. The smooth texture is pleasant and has a quality feel only genuine leather can provide.



    TS Basic - Black is often chosen for situations such as “using a leather cover for the first time,” “wanting to have something special for a new job,” or “giving a planner as a thank-you gift.” It is especially popular as a present for celebrating a new job or a family member’s birthday.



    As the name “Basic” suggests, it is one of the most standard leather covers of the Hobonichi Techo lineup. It has all the unique features of the Hobonichi Techo cover, including the “butterfly-stopper” pen holders, two bookmarks, and finely divided pockets inside, so we confidently recommend it.

    Introduction to the Standard series products

    (Hobonichi Techo 2025 lineup)

    Staff List

    Photographer
    Styled Images:Keiko Ichihara/ Product Detail: Hiroyuki Oe
    Stylist
    Mari Nagasaka
    LeatherTS Basic - BlackA5 Cousin Size
    1. ¥18,920 - ¥20,570 (incl. tax)
    2. ¥15,400 (incl. tax)

    20 per item
    Available
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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. 166 g
    Main materialExterior: Cow leather / Interior: Cow leather, polyester
    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 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

    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 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

    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 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)
    SizeA5 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
    WeightApprox. 445 g
    LanguageEnglish
    Pages544 pages
    Paper Type / BindingThin, light Tomoe River paper that is smooth to write on and designed for planners / Stitch-binding
    Graph Paper Size3.7 mm
    Start of WeekMonday-start week
    Yearly Calendar2025, 2026, 2027
    Yearly IndexJan. 2026 - Dec 2026 (4 pages)
    Monthly CalendarDec. 2025 - Mar. 2027 (32 pages)
    Daily PagesJan. 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 QuotesOne quote per two-page spread (English)
    Weekly Pages Dec 29, 2025 - Jan 3, 2027 (106 pages)
    Memo Pages6 pages
    Bonus PagesTime 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 InformationDay 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)
    OtherSee the Exploring Each Type page for more details
    Book (Cousin / Japanese / January Start)
    SizeA5 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
    WeightApprox. 445 g
    LanguageJapanese
    Pages544 pages
    Paper Type / BindingThin, light Tomoe River paper that is smooth to write on and designed for planners / Stitch-binding
    Graph Paper Size3.7 mm
    Start of WeekMonday-start week
    Yearly Calendar2025, 2026, 2027
    Yearly IndexJan. 2026 - Dec 2026 (4 pages)
    Monthly CalendarDec. 2025 - Mar. 2027 (32 pages)
    Daily PagesJan. 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 QuotesOne per day (Japanese)
    Weekly Pages Dec 29, 2025 - Jan 3, 2027 (106 pages)
    Memo Pages6 pages
    Bonus PagesTime 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 InformationDay 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)
    OtherSee the Exploring Each Type page for more details
    Book (Cousin Avec / Japanese / January Start / 2-Book Set)
    SizeA5 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
    WeightEach Book: Approx. 260 g
    LanguageJapanese
    PagesEach Book: 288 pages
    Paper Type / BindingThin, light Tomoe River paper that is smooth to write on and designed for planners / Stitch-binding
    Start of Week3.7 mm
    Start of WeekMonday-start week
    Yearly Calendar2025, 2026, 2027
    Yearly IndexBook 1: Jan. - Dec. 2026 (4 pages)
    Book 2: Jul. 2026 - Jun. 2027 (4 pages)
    Monthly CalendarBook 1: Dec. 2025 - Jul. 2026 (16 pages)
    Book 2: Jun. 2026 - Jan. 2027 (16 pages)
    Daily PagesBook 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 QuotesOne 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 PagesBook 1: 8 pages
    Book 2: 4 pages
    Bonus PagesTime 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 InformationDay 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)
    OtherSee the Exploring Each Type page for more details
    Book (Day-Free A5 size / Japanese / Monthly)
    SizeA5 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
    WeightApprox. 220 g
    LanguageJapanese
    Pages224 pages
    Paper Type / BindingThin, light Tomoe River paper that is smooth to write on and designed for planners / Stitch-binding
    Graph Paper Size3.7 mm
    Start of WeekMonday-start week
    Yearly Calendar2025, 2026, 2027
    Yearly IndexJan. - Dec. 2025 (4 pages)
    Monthly CalendarDec. 2025 - Mar. 2027 (32 pages)
    Daily QuotesIncluded (Japanese)
    Graph Paper171 pages
    Bonus PagesTime 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 InformationDay 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)
    OtherSee 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.

    Send a comment

    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.

    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.

    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.

    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.