Pilot Iroshizuku Hotaru Bi 15 ml Fountain Pen Ink

Pilot Iroshizuku hotaru bi 15 ml Fountain Pen Ink

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.

Concept and Design

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.

Performance and Compatibility

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.

Tip for Best Color Perception

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.

See the ink in action

You can see how this ink behaves in illustration in the following video (from 1:07): watch on YouTube.

Package Contents

This bottle contains 15 ml of Pilot Iroshizuku hotaru bi ink. (Colors shown on screen may vary slightly depending on the paper used.)

Technical Specifications

• Color: hotaru bi (yellow-green inspired by firefly light)
• Ink type: water-based dye ink
• Volume: 15 ml
• Product weight: 77 g
• Compatible with all fountain pens
• Made in Japan

FAQ

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.

Your opinion matters

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Brand Story

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.”