Pen & Paper
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Yamamoto Paper Tomoegawa Tomoe River

The original Tomoe River paper, made by Tomoegawa Co. before its Tomoe River machines (Shizuoka Plant No. 7, then No. 9) were both decommissioned by late 2021 -- still sold today as a 200-sheet A5 wr…

Weight
Tooth
Sheen
Bleed
Tone
Dry time
№ 01 · Attributes

The sheet, by every measure.

All readings under standard lab conditions — 21 °C, 50 % RH, Iroshizuku Tsuki-yo on a Medium 14k.
Identity & Provenance i.

The mill, the lineage, and the line this sheet belongs to.

Substance & Composition ii.

What the sheet is made of, how thick it is, and how much light passes through.

Surface & Finish iii.

What the nib feels under the hand — and what keeps the ink on top.

Behaviour with Ink iv.

Feathering, bleed, ghosting, sheen, shading — measured against the catalogue's distribution.

Dry Time · by Nib v.

Seconds to a smudge-free pass. Standard ink: Iroshizuku Tsuki-yo, room conditions.

Watermark & Texture vi.

What the sheet shows against the light, and what the hand reads of its surface.

Mill & Heritage vii.

The mill, the machine, the certifications — and the story of the predecessor sheet.

Format, Binding & Sizes viii.

How the sheet is sold, bound, ruled — and in what sizes.

Editor's note · A. Reber

A paper that exists because some inks needed somewhere to go. Reserve for the ones whose second colour — the sheen — is the whole point.

Care notes

  • Store sealed→ humidity
  • Keep flat→ curl
  • Don't fold→ creases set
  • Allow 60 s→ wet inks

Pricing

€ 8 · A5 pad of 100
€ 22 · A4 pad of 100

Tier I · ~ €0.08 per sheet

№ 02 · On the Page

The same paper, three different pens.

All samples in Iroshizuku Tsuki-yo, indoor 2700K. Affinity scored against this sheet.
№ 03 · Recommended Marriages

Pairings featuring Tomoe River.

From the catalog. Sorted by affinity.