Pilot Pen Company

Pilot Iroshizuku Kon-Peki Ink Review

Pilot Pen Company has been producing high quality ink for many years and the Pilot Iroshizuku Kon-Peki Ink is one of their best. A few years ago, Pilot Namiki raised the global ink standard exponentially with its Iroshizuku inks. Once the pen enthusiast got over the initial sticker shock of this luxury priced ink, they have come to embrace and love each Iroshizuku ink color. Pilot, raised the bar not only in its presentation and bottle design, but in the variety of ink colors being offered, all of which are known in the industry to be some of the best water based inks on the market, This smooth flowing ink works well in all fountain pens, is easy to clean, and is absolutely dependable.

We just happened to choose the number one selling Iroshizuku ink color to review, Kon-Peki. The name itself draws you in to this fabulous blue ink color, which actually has a variety of names depending on who you ask. For your information, this ink is known as all or a combination of the following: Pilot Iroshizuku: Kon-Peki, Deep Azure Blue and Cerulean Blue. We will stick with the Japanese name Kon-Peki. The Pilot Iroshizuku Kon-Peki ink is just one of the many color variations that Pilot offers in the ink line. The name Iroshizuku is a combination of two Japanese words meaning colors and droplets, with each color being found in the wide array of the Japanese’s diverse natural world.

Pilot Iroshizuku Kon-Peki Ink

Pilot Iroshizuku Kon-Peki Ink

While testing this fountain pen ink, we have found the following characteristics, which we hope may be helpful to you:

Testing Factors

We used Rhodia Block paper with a small tip J. Herbin Glass dip pen.

Bottle Sizes

Pilot Iroshizuku inks come in one of the best bottles in the industry. The 50 ml large bottle is a display quality ink pot, heavy weighted glass bottle with a distinctive “last drop” tip at its base. With only Pelikan Edelstein ink bottles comparing in elegance, this bottle is one of the best the ink business has to offer.


As it is notoriously known for, Pilot Iroshizuku Kon-Peki ink is at the top end of all bottle inks, retailing for $35.00 for a 50 ml. bottle. Its display presence, quality, and vibrant color, makes it worthwhile as a luxury ink.

Dry Time

While using the J. Herbin glass dip pen, which is like an extra fine, we experienced an outstanding dry time of about 3 seconds. While using a larger nib you will experience a longer dry time, but regardless its superfast comparing almost to a Noodler’s Eternal ink color.

Bleed Through

We experienced zero bleeding, even with the wettest use of a cotton swab.


There is absolutely no feathering under normal use. However, during the water test, there was substantial feathering as this is not a waterproof ink.

Water Test

The Iroshizuku Kon-Peki ink is not waterproof. When we ran a wet cotton swab over ink samples after letting them dry for over 3 minutes, a distinct bleeding, feathering, and color smear was experienced until the cotton swab used up its wetness.


Pilot Iroshizuku Kon-Peki ink will produce some shading and variations within this vibrant color.

Conclusion about the Pilot Iroshizuku Kon-Peki Ink

Expensive, but the larger bottle size, extra qualities and characteristics you get when purchasing this Iroshizuku ink, makes up for the increased price. Exceptional packaging and display quality glass bottle, fairly large size, unique “last drop” tip, excellent ink qualities such as the vibrant color, fast drying, easy to clean, superb ink flow and the ability to use this ink with any fountain pen, makes Iroshizuku inks a favorite. Although its hard to pronounce at first, Pilot Iroshizuku inks will require you to learn just a little bit of Japanese in the vernacular of Japan’s marvelous natural world.