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Pilot Iroshizuku Hotaru Bi 15 ml fountain pen ink features a bright yellow-green tone inspired by the glow of fireflies. Smooth, vibrant, and unique, it is perfect for creative writing and highlighting.
Hotaru bi is a vibrant, luminous ink featuring a bright yellow-green tone inspired by the glow of fireflies on warm Japanese summer nights. Its unique color brings energy and freshness to the page, making it an excellent choice for expressive writing and creative use. The 15 ml format is perfect for discovering the color or rotating inks frequently.
Pilot’s Iroshizuku series celebrates the beauty of Japanese nature. The name combines “iro” (color) and “shizuku” (drop). Hotaru bi (蛍火) translates as “firefly light,” evoking the soft, fleeting glow of fireflies in the dark.
In Japanese culture, fireflies symbolize summer evenings, nostalgia, and the beauty of fleeting moments. Their brief and delicate light is often associated with the concept of mono no aware, reflecting an appreciation for transience and impermanence. In traditional folklore, they have also been linked to the souls of loved ones, adding emotional depth to their gentle glow.
Hotaru bi stands out for its brightness and distinctive character. Depending on paper and nib, it can shift between vivid yellow and greenish tones. It is ideal for highlighting, creative writing, journaling, or artistic expression where color plays a central role.
This water-based dye ink is compatible with all fountain pens. It offers smooth flow, good lubrication, and balanced drying time. The compact 15 ml bottle is ideal for exploring unconventional colors.
To fully appreciate the brightness of hotaru bi, we recommend high-quality paper such as Midori MD Cotton Pad A5 or Midori MD Cotton Pad A4, which enhance its luminosity and subtle shading.
You can see how this ink behaves in illustration in the following video (from 1:07): watch on YouTube.
This bottle contains 15 ml of Pilot Iroshizuku hotaru bi ink. (Colors shown on screen may vary slightly depending on the paper used.)
Is it compatible with all fountain pens?
Yes, it is a water-based dye ink suitable for all fountain pens.
Is it suitable for everyday writing?
Yes, although its brightness makes it especially suitable for creative or highlight use.
Is it easy to clean?
Yes, it can be easily cleaned with water.
Who is this color for?
Ideal for users looking for a unique, luminous, and expressive ink.
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Since 1918, Pilot has combined Japanese craftsmanship with innovation to create writing instruments that blend precision, beauty, and emotion. The Iroshizuku series transforms ink into a sensory experience inspired by nature.
“Even the smallest light can leave a lasting impression.”
