Can you refill it or is it disposable?

You can refill this, with either a Pilot converter or with a Pilot cartridge. Pilot uses proprietary converters and cartridges.

Can the Con-40 converter be used in this pen?

The Con-B, Con-40 and the Con-70 can all be used in the Pilot Kakuno.

Is the ink waterproof and archival?

Pilot Namiki ink, which is what comes in the cartridge with the pen, is not waterproof or archival. For replacing the ink in the cartridge with permanent, archival-quality, and water resistant ink, I recommend buying Diamine Registrar's Blue-Black Ink, a 3ml luer-lock syringe, and a blunt-tipped dispensing needle at least 3 inches long. 1. Gently insert the cartridge (JUST BARELY) into the pen, only enough to open the cartridge. Pull it back out, rinse the ink out of the pen, and empty the ink from the cartridge with the syringe and needle. Dispose of the ink, and rinse the cartridge, syringe, and needle with clean water. Shake the water out of the cartridge. You can dry it out with a Q-tip if you don't want you new ink diluted at all. 2. Withdraw ALMOST 1ml of the Registrar's Blue-Black Ink with the syringe, and fill the cartridge with it. 3. Insert the newly refilled cartridge into the pen, gently but firmly. Set the pen nib-down in a cup , with the cap on, for 5-10 minutes, so the ink can saturate the feed and reach the nib. And don't press too hard if it's still not writing yet. Give it some more time.

What size cartridge does this pen take?

The PILOT KAKUNO FP takes a PILOT NAMIKI IC100 FOUNTAIN PEN INK CARTRIDGE or a PILOT CON 40 converter.

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Pilot Kakuno Fountain Pen, Clear Barrel, Extra Fine Nib (10816)

Product ID: 222290891

Details

Age range (description)
All age ranges
Brand
PILOT
Colour
Clear Barrel
Ink colour
Black
Material
Plastic
Model name
Kakuno

🔄Hexagonal Grip for Comfortable Hold

🔍Clear Barrel for Ink Visibility

✒️0.3mm Extra Fine Nib

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C$2593

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Description

✍️ Write sharp, write smart — the pen that smiles with you!

ERGONOMIC HEX GRIP - Hexagonal shape ensures fatigue-free writing for long creative sessions.
TRANSPARENT ELEGANCE - Clear barrel design lets you monitor ink levels while showcasing minimalist style.
PRECISION IN EVERY STROKE - Experience ultra-fine 0.3mm nib perfect for detailed writing and sketching.
TRUSTED LEGACY OF QUALITY - Backed by Pilot’s 100+ years of pen craftsmanship for reliable, smooth ink flow.
BEGINNER FRIENDLY WITH A SMILE - Smiley face on nib guides perfect pen angle, making it ideal for novices and pros alike.

The Pilot Kakuno Fountain Pen features an extra fine 0.3mm nib housed in a clear barrel with a hexagonal grip, designed to help both beginners and experienced users achieve precise, comfortable writing. Its unique smiley face nib ensures correct pen positioning, while the transparent body lets you track ink levels. Lightweight and ambidextrous, this pen combines Pilot’s century-long expertise with playful design, making it a top choice for bullet journaling, sketching, and everyday writing.

Specifications

ASIN	B07KBN9YTK
Age Range Description	All age ranges
Best Sellers Rank	5,050 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 15 in Fountain Pens
Body Shape	Hexagonal
Brand Name	PILOT
Closure Type	Retractable
Colour	Clear Barrel
Customer Reviews	4.6 4.6 out of 5 stars (1,668)
Drill Point	Extra Fine
Global Trade Identification Number	00072838108166
Grip Type	Dotted
Hardness	1.0
Included Components	Pilot Kakuno Fountain Pen, Extra Fine Nib, Clear Barrel, Clear Cap, Black Ink, Single Pen (10816)
Ink Base	Water
Ink Colour	Black
Is the Product Left or Right Handed?	Ambidextrous
Item Dimensions	6.9 x 20.6 x 15.7 centimetres
Item Type Name	Kakuno Fountain Pen, Extra Fine Nib, Clear Barrel, Clear Cap, Black Ink, Single Pen (10816)
Item Weight	0.02 Pounds
Line Size	0.3mm
Manufacturer	Pilot Pen Corporation of America
Material Type	Plastic
Model Name	Kakuno
Model Number	Kakuno 10816
Recommended Uses For Product	Writing
Special Features	Capped
Style	Extra Fine Nib
Subject Character	Smiley Face
Theme	Writing
UPC	072838108166
Unit Count	1.0 count
Water Resistance Level	Not Water Resistant
Writing Instrument Form	Fountain Pen
Writing Technique	fountain pen

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