The Japan Shelf

Japanese Notebooks and Planners: 9 Picks, and Why Japanese Diaries Start in April

Written in Japan · Updated August 2026

Two things about Japanese planners catch people out. Paper sizes here include a B series that barely exists elsewhere, so a B5 notebook will not fit an A5 cover. And a large share of Japanese diaries start in April rather than January, because the school and business year does. Check both before ordering.

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No. 1

Hobonichi Techo · $30-60

A page a day on Tomoe River paper, which is startlingly thin and still does not bleed through with fountain pen ink. It has a large following abroad for good reason. The book lies completely flat because of the binding, which is what makes a page-a-day format usable at all.

  • One page per day, dated
  • Tomoe River paper — thin, and fountain pen safe
  • A6 is the original, A5 Cousin is the larger version
Link coming soon
No. 2

Stalogy 365Days Notebook · $18-30

Undated, so it starts whenever you start it and does not waste months if you abandon it in March. Thin grid paper with a light date grid printed at the top of each page that you fill in yourself. The compromise between a planner and a plain notebook.

  • Undated — no wasted pages
  • Very thin paper, so it holds a year in one book
  • Grid, which suits both writing and sketching
Link coming soon
No. 3

Kokuyo Campus Notebook · $12-22

The plain school notebook, used by essentially every Japanese student. Nothing special about it except that the paper is better than a school notebook has any need to be, and it costs about two dollars. Buy a pack.

  • Cheap enough to use without precious feelings about it
  • B5 is the standard here — check it fits your bag and covers
  • Dotted rule versions help keep handwriting straight
Link coming soon
No. 4

Traveler's Notebook · $45-80

A leather cover with elastic bands holding replaceable paper inserts. The cover is the purchase and it lasts decades, ageing visibly. The inserts are cheap, so a planner, a diary and a sketchbook can live in the same cover at once.

  • Cover lasts for years, refills are inexpensive
  • Regular size is tall and narrow, passport size is pocketable
  • Multiple inserts in one cover at the same time
Link coming soon
No. 5

Shitajiki Writing Board · $5-12

A thin plastic sheet placed under the page you are writing on. Every Japanese schoolchild has one and almost nobody outside Japan owns one. It stops the texture of the pages underneath showing through, and stops pen pressure embossing the next sheet. Two dollars, and it noticeably improves handwriting on thin paper.

  • Stops indentation carrying through to following pages
  • Essential with thin paper like Tomoe River
  • B5 and A4 are the common sizes
Link coming soon
No. 6

Zebra Sarasa Clip Gel Pens · $12-25

The everyday gel pen here. Quick-drying pigment ink, which matters for left-handed writers and for thin paper, and the 0.4mm is the size most Japanese offices run on. The colour range is enormous and the muted set is the one worth buying.

  • 0.4mm is the standard here, 0.5mm if you write large
  • Pigment ink, so it does not smudge or fade
  • The Vintage colour set is the one people import
Link coming soon
No. 7

Uni Jetstream Ballpoint · $10-20

A ballpoint that writes with almost no pressure, which is unusual. If you write a lot by hand and your hand aches, this is the practical fix. It is the best-selling pen in Japan and it is not a design object, it is just a very good pen.

  • Requires noticeably less pressure than a normal ballpoint
  • 0.5mm and 0.7mm are the common sizes
  • Multi-pen versions hold three colours and a pencil
Link coming soon
No. 8

Index Tab Stickers · $6-14

Small film tabs stuck to a page edge. In Japan they are how an undated notebook becomes navigable, and film ones survive a year of being turned where paper tabs tear off within weeks.

  • Film, not paper — paper tabs do not last
  • Stick to the page edge, not the cover
  • Turns any plain notebook into a sectioned one
Link coming soon
No. 9

Pen Case, Flat Zip · $15-30

Flat rather than boxy, so it slides into a bag beside a B5 notebook without adding bulk. The standing type that converts into a pen pot is a Japanese office fixture and genuinely useful on a small desk.

  • Flat profile fits alongside a notebook
  • The standing type doubles as a desk pen pot
  • Fabric ones wash, leather ones do not
Link coming soon

How to choose

Dated or undated?

Undated if you have abandoned a planner before, which is most people. Stalogy and plain notebooks lose nothing when you skip three weeks. A dated Hobonichi is better if you write daily and worse if you write occasionally, because the empty dated pages become a reproach.

What size?

A5 if it lives on a desk, A6 if it lives in a bag. B5 is the Japanese school and office standard and it is larger than A5 — useful to know, because a B5 notebook will not fit an A5 cover and the two are easy to confuse when ordering.

Which pen for which paper?

Gel or fountain pen on Tomoe River and MD paper, which are made for wet ink. Ballpoint on Campus and ordinary notebook paper, where a gel pen can feather. If you only want one pen for everything, the Jetstream is the safe answer.

Questions

Why do Japanese planners start in April?

The Japanese school year and the business fiscal year both begin in April, so a large share of diaries here are April-to-March. January-start versions also exist for the same products. Check which one you are buying — an April diary bought in December wastes three months.

When do next year's planners go on sale?

Japanese planners for the following year appear in September and the popular ones sell out by December. Hobonichi in particular releases annually in September and specific covers do not come back. If you want one for January, order in autumn.

Is Tomoe River paper worth the fuss?

For fountain pen users, yes — it is remarkably thin and still resists bleed-through, which is how a page-a-day book stays a normal thickness. It is also slow to dry, so left-handed writers smudge it, and it feels flimsy if you press hard. Use a shitajiki under it.

What is the difference between B5 and A5?

B5 is 182 by 257mm, A5 is 148 by 210mm — B5 is meaningfully larger. The B series is a JIS standard used widely in Japan and rarely elsewhere, which is why Japanese notebooks sometimes do not fit covers and sleeves bought abroad.

Do I need a special notebook to start?

No. A pack of Kokuyo Campus notebooks costs a few dollars and the paper is better than the price suggests. Spend the money on the pen first — that changes the experience of writing far more than the notebook does.