Boku-Undo Gansai Traditional Japanese Watercolor Paints (18 Colors)

Boku-Undo Gansai Traditional Japanese Watercolor Paints in the 18-color set sits between the starter palette and the full range, made in Nara by a sumi manufacturer founded in 1805. The six extra pans over the 12-color set add two greens, two blues, a vermillion red, and a violet, giving more options for foliage, sky, water, and richer color mixing without growing the box much. Gansai is the traditional Japanese pan watercolor format used for etegami (Japanese picture letters), color accents in sumi-e and saibokuga (colored sumi painting), and Japanese-style sketching on washi.

This is a working-sized palette rather than a tasting kit. With 18 pans, a single sketch session can usually be finished without going back to mix custom tones, and the colors stay distinct enough that you can identify them at a glance even in the closed box. The pans rewet instantly with a wet brush and load high pigment with very little water.

The pigments are bound in gum arabic and behave like modern pan watercolors while keeping the matte, slightly chalky finish of classical Japanese paint. The 18 color names are all drawn from Nihon no Dentōshoku, the traditional Japanese color vocabulary that ties each tone to a plant, mineral, or natural scene, so the palette also serves as a small primer in this older way of describing color.

Boku-Undo has been making sumi in Nara since 1805. Its Gansai line continues that two-century craft in pan watercolor form. With 18 pans, this set is enough for finished etegami, full watercolor sketches, sumi-e color work, and small botanical studies. It performs best on washi but is fully usable on standard watercolor paper.

If twelve is enough or twenty-four is closer to what you need, see the 12-color starter set and the 24-color full set in the same line. For a darker, sumi-grounded alternative, see the Sumi Ink Watercolor Paints — Shadow Black set. The pans pair naturally with the Akashiya Sai Water Brush Pen for travel sketching.

How to Use

1. Wet a brush with clean water.
2. Touch the brush to a pan to load color. A quick dip gives a transparent wash; pressing longer builds toward an opaque masstone.
3. Paint directly on washi or watercolor paper, or mix two pans in a separate dish for in-between tones. Two adjacent washes will bleed softly into each other.
4. Rinse the brush between colors. The pans rewet cleanly even after months of sitting closed.

Details

• Set contents: 18 dry watercolor pans in traditional Japanese colors
• Weight: 8.3 oz (234 g)
• Materials: pigments
• Origin: Made in Nara, Japan
• Brand: Boku-Undo

The Story of Boku-Undo

Founded in 1805 in Nara, a city that has produced Japanese ink for roughly thirteen hundred years, Boku-Undo has spent more than two centuries refining sumi for calligraphers, painters, and schools. The workshop still produces traditional ink sticks that are ground by hand on inkstones, but it also experiments steadily at the edges of that tradition: liquid sumi for brush painting, pan-format watercolors with sumi-grounded color, and these traditional gansai sets in the modern Japanese pan watercolor tradition.

What stays constant across every Boku-Undo product is the company's relationship with carbon and pigment. Whether it is a sumi stick, a sumi-grounded color watercolor, or a vivid gansai pan, the goal is the same: a paint that holds depth and opacity without losing the airy quality of Japanese paper. The Gansai line is Boku-Undo's continuation of that craft in the language of traditional Japanese color.