Pilot Iroshizuku Shin Kai 50 ml Fountain Pen Ink
Elegant, deep and understated, the Pilot Iroshizuku Shin Kai 50 ml Fountain Pen Ink features a dark blue colour with subtle grey undertones inspired by the depths of the ocean. Its tone conveys serenity, professionalism and balance, making it one of the most appreciated inks in the entire Iroshizuku collection for both everyday writing and professional use.
The Iroshizuku collection was created by Pilot to capture the colours of Japanese nature. “Iro” means colour and “shizuku” means droplet, giving life to a series of inks that transform landscapes, seasons and natural elements into writing experiences.
Shin-kai (深海) literally means:
- 深 (shin) = deep
- 海 (kai) = sea, ocean
The direct translation is therefore: “Deep Ocean” or “Deep Sea”.
This colour reflects the stillness of deep waters, where light gradually fades and colours become denser and more sophisticated. The result is a refined dark blue that combines the elegance of a classic blue with a discreet grey influence that adds maturity and character.
Within the Iroshizuku collection, Shin Kai has become one of the most popular colours among writers seeking an elegant, versatile blue that is easy to use every day. Its balance of depth, readability and personality makes it a favourite among fountain pen enthusiasts and professionals alike.
Concept and Design
Shin Kai stands out for its visual balance. Depending on the paper and nib used, it can display attractive shading that ranges from navy blue to delicate blue-grey undertones. This tonal variation adds depth to the writing without compromising readability.
It is particularly well suited to those seeking a more sophisticated alternative to conventional blue inks while maintaining a professional and elegant appearance. Its colour conveys calm, concentration and quiet confidence, qualities that help explain its popularity within the Iroshizuku range.
Performance and Compatibility
Like all Pilot Iroshizuku inks, Shin Kai is formulated with high-quality water-soluble dyes. It offers smooth flow and an exceptionally pleasant writing experience, even during long writing sessions.
The elegant 50 ml glass bottle, characteristic of the Iroshizuku collection, also makes filling easy even when the remaining ink level becomes low.
Tip for Appreciating the True Colour
To fully appreciate the depth and tonal richness of Shin Kai, we recommend using quality papers such as the A5 Life Noble Note Plain Notebook, which showcases the ink’s subtle shading and colour nuances beautifully.
See the Colour in Use
You can observe how this ink behaves on paper in the following video. From minute 0:55 onwards, its true colour and characteristic shading can be clearly appreciated.
Package Contents
The elegant glass bottle contains 50 ml of Pilot Iroshizuku Shin Kai fountain pen ink and is presented in the distinctive Iroshizuku gift box. (Colours shown on screen are indicative and may vary slightly depending on the paper used.)
If you are looking for another colour from the Iroshizuku collection and cannot find it listed, please contact us at inktraveler@inktraveler.com; we will be delighted to assist you.
Technical Specifications
- Colour: Shin Kai (dark blue inspired by the deep ocean)
- Ink type: water-based dye ink
- Capacity: 50 ml
- Pilot Iroshizuku glass bottle
- Compatible with fountain pens of any brand
- Made in Japan
Frequently Asked Questions
What does Shin Kai mean?
Shin-kai (深海) literally means “deep ocean” or “deep sea”, referring to the dark and tranquil waters of the ocean depths.
Is it compatible with any fountain pen?
Yes. Like all Pilot Iroshizuku inks, it can be used safely in fountain pens from any manufacturer.
Is it suitable for everyday use?
Yes. Its excellent readability and professional appearance make it a very popular choice for daily writing.
Does it show shading?
Yes. Medium and broad nibs in particular reveal attractive shading between navy blue and blue-grey tones.
Is it suitable for professional documents?
Yes. Its elegant dark blue colour provides an excellent alternative to conventional blue inks in professional environments.
Is it easy to clean?
Yes. As a water-based dye ink, it can normally be cleaned easily with water.
Your Opinion Matters
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History and Philosophy of the Brand
Since 1918, Pilot has combined Japanese craftsmanship with technical innovation to create writing instruments that unite precision, beauty and emotion. The Iroshizuku series transforms natural inspiration into a unique writing experience.
"In the depths of the ocean, silence acquires colour."
