KAWAISOUNI! Opanchu Usagi (Blue)Weeks Hardcover Book (Japanese)

“Opanchu Usagi” is a character created by KAWAISOUNI!, an illustrator and animator especially popular on social media. The rabbit wearing a large “Opanchu” underwear and always in a somewhat “Kawaisou” pitiful situation gives a sense of indescribable cuteness and melancholy.

“Opanchu Usagi (Blue)” is a Weeks book with a lively design of various Opanchu Usagi drawn all over the cover. The Opanchu Usagi in different expressions will make your day lively and colorful.

You might notice the one placed near the center of the cover, which has a Hobonichi Techo and a pencil in its hand. It is a special feature of this techo.

The pop typeface "2023" is in bright pink.

The spine of the cover is in the same pink color, with the Opanchu Usagi logo, “2023” wearing a symbolic blue ribbon, and an Opanchu.

Let’s have fun in the new fiscal year starting in April with Opanchu Usagi by your side!

When you order this Hobonichi Techo Weeks, you’ll receive a clear, adhesive corner pocket you can stick anywhere you like.

When you purchase your Hobonichi Techo through the online Hobonichi Store, you will receive a free 2023-edition (navy x brown pen body) Hobonichi Store exclusive 3-color Jetstream ballpoint pen (available while supplies last).

If you’d like storage space or a way to change up the look of your Weeks book, you can customize your book by pairing it with a Weeks cover.

See Weeks cover lineup

Staff List

Styled Images: Nobuki Kawaharazaki / Product Detail: Hiroyuki Oe
Minami Nosaki
Makeup & Hair
Daisuke Yamada (cake.)
KAWAISOUNI! Opanchu Usagi (Blue)Weeks Hardcover Book (Japanese)



SizeH: 188 x W: 94 x T: 10 mm / H: 7.4" x W: 3.7" x T: 0.4"
*Specifications may vary slightly
WeightApprox. 140 g
Main materialPaper
Weeks Book (Japanese / April Start)
Pages 240 pages
Paper Type / Binding Thin, light Tomoe River paper resistant to bleeding and designed for planners / Stitch-binding
Graph Paper Size3.55 mm
Start of WeekMonday-start week
Yearly Calendar2022, 2023, 2024
Yearly IndexApr. 2023 - Mar. 2024 (2 pages)
Monthly CalendarMar. 2023 - Apr. 2024 (28 pages)
Daily QuotesOne per week (Japanese)
Weekly PagesFeb. 27, 2023 - Mar. 31, 2024 (114 pages)
*All weekly pages include quotes.
Graph Paper75 pages
Bonus PagesShorthand Note-Taking / Using Common Items to Measure Size / My 100 / Solar Terms / My Favorite Things / How to Better Enjoy Conversation / Emergency Preparedness / Age Table / Conversion Chart / Getting the most of Hobonichi / Contact List / Personal Notes
Listed InformationWeek of the year / Rokuyo (traditional Japanese calendar) / Solar terms / Japanese holidays / Moon phase (weekly pages include every phase, monthly calendars only include full and new moon)
OtherSee 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.

Test fountain pens before regular use

The Hobonichi Techo's Tomoe River paper is designed to prevent bleed-through, but some fountain pens and water-based ink pens are not compatible with this paper. When switching to a new pen, we recommend testing the pen somewhere in the book, such as the back memo pages, to see if the ink bleeds through or takes an especially long time to dry.

Cover corners are slightly bumpy and shiny

The corners of the cover contain light traces of press marks, shines, and lumps. This is an unavoidable part of the manufacturing process.

Coloring may stain other objects

The dye in the cover may stain other objects if it rubs against or sticks to them, especially if the cover is wet from water or sweat from your hands. Please store with care.

Foil-pressed words may peel

The foil-pressed words may peel off with everyday use. Please be careful not to rub it strongly.

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.

Avoid using with Clear Cover

This cover uses thicker materials than usual, so it may not fit. Forcing it into a Clear Cover may damage the product.