FOUNTAIN PENS — MADE IN TOKYO

The proof isin the line.

KAKU makes one fountain pen, three nibs, three inks. Nothing else. Try the nib before you read another word.

See the pen

Your cursor is the nib.

The KAKU fountain pen, capped

N-2026-07 - BENCH SHEET 114

THE NIB

Anatomy of the point

The nib is ground in-house, checked by hand against a loupe, and written with before it ships. These are the parts that decide how a line feels.

Macro photograph of the KAKU 14k gold nib: heart breather hole, hand-cut ink slit, and the KAKU 14K engraving, mounted on the black grip section
01  Tipping ball0.3-0.8 mm
02  Ink slit0.06 mm
03  Breather holeR 0.5 mm
04  Tines2
05  Shoulder9.2 mm

THE INK

Three inks, mixed slow

Small-batch, pigment-stable. Swatches below are drawn live, not photographed.

Blue Black

The working ink — steady, archival, quiet.

Kon

Deeper and cooler. For letters you mean.

Shu

Vermilion for margins, corrections, courage.

Fountain pen nib writing on lined paper

THE BENCH - OTA-KU, TOKYO

THE PEN

One model. Made properly.

The KAKU pen, capped

一本の萬年筆だけを、つくりつづける。

We keep making just one pen.

Ebonite body turned on a single lathe, brass fittings cut in Ota-ku, nib ground and tuned by one person from start to finish. If it is not right, it does not leave the bench.

BodyHand-turned ebonite
FittingsBrass, machined in Ota-ku, Tokyo
Nib14k gold, ground in-house
FillingCartridge / converter
Lead time6 weeks, made to order
Bench logUpdated 2026.07

WRITE TEST

Compare the nibs

Same pen, same ink, four grinds. Switch and write — the width you feel is the width you get.

approx 0.4 mm

ORDER

Three ways to start

Prices include one ink bottle and a written test sheet from the bench.

Pen + F nib

¥48,000

The standard grind. Most orders start here.

Order the pen

Pen + your grind

¥54,000

EF / M / B, tuned to your writing sample.

Ink set only

¥6,600

Three bottles, boxed. For pens you already love.

Craftsman working at a workshop bench

THE LATHE - OTA-KU, TOKYO