Experience the expressive freedom of watercolor painting in a compact, portable form with the Akashiya Sai Watercolor Brush Pen. Crafted in Nara, Japan by a brushmaking company with over 300 years of tradition, this brush pen features soft synthetic bristles and water-soluble dye ink, offering the control of a pen with the flow of a real brush.

Whether you’re sketching on the go, adding color to manga or illustrations, or experimenting with hand lettering, the Akashiya Sai Watercolor Brush Pen allows for smooth lines, dynamic strokes, and effortless blending with water. Choose from three brush sizes—Thin for delicate detailing, Medium for versatile control, and Bold for broad, expressive strokes.

Perfect for artists, hobbyists, and calligraphy lovers alike, this pen combines traditional Japanese craftsmanship with modern convenience. Just uncap and paint—no setup, no mess.

Explore our Japanese brush pens, a harmonious blend of tradition and ease.

Details

Length (Pen): 6.7" (17 cm)
Weight: 0.35 oz (10 g)
Tip Length: 0.4" (1.0 cm)
Tip Type: Soft synthetic brush
Refillable: Yes (reusable water reservoir)
Brand: Akashiya

The Story of Akashiya

Akashiya was founded in 1716 in Nara, the city where Japanese brushmaking has been practiced for over a thousand years and which remains the country's main center for handmade fude (writing brushes). The workshop spent its first two centuries making traditional calligraphy and painting brushes (bristle bundled, glued, and shaped by a single artisan from start to finish), and that one-brush-one-maker discipline is still the standard for every piece in the line today.

Over the past century Akashiya has extended that craft into adjacent territory: the Sai brush pen series, fountain-pen-style brush pens with their own ink reservoirs, watercolor brush pens in traditional Japanese color sets, sumi-e and nihonga brushes for fine detail and broad strokes, and even makeup brushes. The common thread across all of them is the way the tip holds and releases ink, which is the part of brushmaking that takes the longest to learn and is hardest to mechanize.

What you are holding is a small piece of a 300-year continuous practice, made in the place where Japan's brush tradition began.

Akashiya Sai Watercolor Brush Pens – Japanese Brush Pen Sets

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Akashiya Sai Water Brush Pen