Pilot Iroshizuku Kosumosu 15 ml Fountain Pen Ink

Pilot Iroshizuku kosumosu 15 ml Fountain Pen Ink

Vibrant, floral, and full of energy, Pilot Iroshizuku kosumosu features an intense pink tone inspired by the fields of cosmos flowers that cover the Japanese landscape in autumn. Its color conveys joy, natural beauty, and an expressive character, making it ideal for those who seek writing with personality. The 15 ml format is perfect for discovering this shade or rotating inks with ease.

Pilot’s Iroshizuku collection was created to capture the rich colors of Japanese nature. “Iro” means color and “shizuku” means drop. Kosumosu (コスモス) is the Japanese adaptation of the word “cosmos” and refers to this delicate autumn flower. In Japan, fields of kosumosu attract thousands of visitors each year, creating vibrant and immersive landscapes that inspire this lively and luminous color.

Concept and Design

Kosumosu stands out for its bright pink tone with subtle reddish undertones. Depending on the paper and nib, it can display variations in intensity and soft shading. It is an excellent choice for journaling, creative writing, or adding a visually distinctive touch to your notes.

Performance and Compatibility

Formulated as a water-based dye ink, it is compatible with all fountain pens. It provides smooth flow, good lubrication, and balanced drying time. The compact 15 ml bottle is ideal for those who enjoy exploring different ink colors.

Tip for Best Color Perception

To fully appreciate the vibrancy of kosumosu, we recommend using high-quality paper such as Midori MD Cotton Pad A5 or Midori MD Cotton Pad A4, which enhance its saturation and subtle shading.

See the ink in action

You can see how this ink performs in illustration in the following video (from minute 2:00): watch on YouTube.

Package Contents

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

If you are looking for another Iroshizuku color that is not listed, feel free to contact us at inktraveler@inktraveler.com; we will be happy to assist you.

Technical Specifications

• Color: kosumosu (intense pink inspired by cosmos flowers)
• Ink type: water-based dye ink
• Volume: 15 ml
• Product weight: 77 g
• Bottle size: 67 × 28 × 28 mm
• Compatible with all fountain pens
• Made in Japan

FAQ

Is it compatible with all fountain pens?
Yes, it is a water-based dye ink compatible with all fountain pens.

Is it suitable for everyday use?
Yes, although its vibrant color makes it especially appealing for creative writing.

Is it easy to clean?
Yes, it can be easily cleaned with water.

Who is this color for?
Ideal for those looking for a floral, lively, and distinctive ink.

Your opinion matters

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Brand Story

Since 1918, Pilot has combined Japanese craftsmanship with technical innovation to create writing instruments that unite precision, aesthetics, and emotion. The Iroshizuku series transforms each ink into a sensory experience inspired by nature.

“Color can also be emotion.”