US buying
How to Buy Japanese Notebooks from the US
A source-first buying workflow for official US stores, authorized retailers, imports, marketplace listings, returns, and counterfeit risk.
Open field guideJapanese stationery, mapped
Find the notebook that actually fits.
A source-checked field guide to Japanese paper sizes, planner formats, and refill systems—made for US shoppers who would rather measure once than return twice.
Official-source specifications
No invented hands-on testing
US availability separated from fit
A fit-first approach
“A5” is a size.
It is not a promise.
A5
A6
Weeks
Passport
A notebook can share the same page footprint as another and still miss the cover, rings, or refill band that you expected it to use.
Bungu Atlas keeps three questions separate: How big is it? Which system is it made for? and Can a US shopper currently get it? That separation turns vague product labels into a practical buying decision.
See how the atlas is researchedLatest field guides
Size notes
MD Notebook Sizes and Layouts
Compare current MD Notebook A7, A6, B6 Slim, A5, and A4 Variant formats with blank, lined, grid, and dot-grid options.
Open field guide
Refill systems
Kokuyo Campus A5 and B5 Binder Compatibility
How size, four-ring Binder Notebooks, conventional loose-leaf hole counts, and paper dimensions interact in the Campus system.
Open field guide
Refill systems
TRAVELER’S Notebook Refill Compatibility Matrix
A system-by-system matrix for Regular and Passport notebook, diary, storage, connection, repair, and archive accessories.
Open field guide
Size notes
TRAVELER’S Notebook Regular vs Passport
Compare the two official TRAVELER’S notebook systems by cover and refill dimensions, portability, paper capacity, and intended use.
Open field guide
Planner systems
Hobonichi Planner Formats and Language Options
Original, Planner, Cousin, HON, Weeks, Day-Free, and 5-Year compared by layout, language, size, and date structure.
Open field guideInteractive atlas
Put two formats on the same grid.
Compare width, height, and system notes for Hobonichi, TRAVELER’S notebook, Kokuyo Campus, MD Notebook, and standard A sizes.
Open the comparison toolBrowse by maker
Dated planners
Hobonichi
A research index for Hobonichi Techo formats, language editions, book dimensions, and cover families.
Refill systems
TRAVELER'S COMPANY
Regular and Passport refill dimensions, official system boundaries, and US availability notes.
Notebooks and binders
Kokuyo Campus
A field guide to Campus paper formats, binder variants, and hole-count traps.
Book-inspired notebooks
MD PAPER PRODUCTS
A size and ruling index for MD Notebook formats, from A6 through B6 Slim and A5.