Koi Coloring Brush Pen

A brush pen with vibrant colors ideal for lettering and illustrations

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You can easily enjoy creating vibrant art with the Koi Coloring Brush Pen by lettering, journaling in a notebook, coloring in illustrations and drawing watercolor-style paintings. You’ll also appreciate how this brush pen’s compact size lets it fit easily into your pen case.

Koi Coloring Brush Pen


Flexible brush tip:

Control of thick and thin strokes is crucial to brush lettering. Since the brush nib of Koi Coloring Brush Pen is just the right firmness, even beginners can easily create thick or thin lines exactly as they like. And despite its compact size, you can also draw surprisingly thick lines with Koi Coloring Brush Pen.

Blend and gradate colors at will

Since the Koi Coloring Brush Pen uses water-soluble ink, you can also create beautiful watercolor-like artworks with color blending and gradation. These techniques can be executed easily with a special blender pen or a normal brush.

Won’t bleed through paper:

You don’t have to worry about ink bleeding through your paper when journaling in a notebook. You can feel at ease using Koi Coloring Brush Pen. Use this brush pen as much as you like for your daily journal, study notebooks or your other favorite notebooks.



Q. Could you share us your favorite technique?

A. Yes, it’s “Color blending”.

I often use water-based brush markers which gives transparent appearance when expressing words with a gentle atmosphere. I use the following color mixing technique to smooth out the border between colors. After all, using two or more colors rather than one gives a different impression to the artwork.

  • STEP 1:Making a rough draft

    Draw a rough draft by Light Cool Gray.
    This draft will be a guideline for the next painting.
    By using the lightest color, it won't affect the color on top.

    STEP 1:Making a rough draft
  • STEP 2:Painting the first color

    Paint on a clear plastic folder (or any material which repels water) to release the ink.
    Pick up the ink with a brush and fill in the gray area.

    STEP 2:Painting the first color
  • STEP 3:Blending colors

    Pick up the second color with a brush and paint it.
    Blur the border between the two colors to create a smooth gradation.

    STEP 3:Blending colors
  • STEP 4:Decorating

    ・Add highlight with Gelly Roll White
    ・Draw shadows in gray color

    STEP 4:Decorating