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

Product ID: 253448873

Details

Age range (description)
All age ranges
Brand
Pilot
Colour
Clear
Ink colour
Black
Writing instrument form
Fountain Pen

🔄Retractable closure for convenience

🔲Clear hexagonal barrel for ergonomic grip

✒️Extra Fine Nib for precision

R510

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Description

✍️ Write smart, write happy — the pen that makes every word count!

RETRACTABLE READY - Convenient retractable closure keeps your pen protected and ready to write anytime, anywhere.
INK THAT FLOWS LIKE BUTTER - Water-based black ink delivers smooth, consistent lines—perfect for bullet journaling, note-taking, and creative projects.
PRECISION MEETS PLAYFULNESS - Extra fine nib with a smiley face ensures perfect writing angle and smooth strokes.
TRUSTED LEGACY MODERN STYLE - From a century-old brand, combining retro charm with contemporary clear design to elevate your desk aesthetic.
EFFORTLESS GRIP ALL DAY COMFORT - Hexagonal clear barrel designed for easy hold and ambidextrous use—no hand fatigue during long sessions.

The Pilot Kakuno Fountain Pen (Clear Barrel, Extra Fine Nib) is a beginner-friendly yet professional-grade writing instrument featuring a playful smiley face nib for perfect writing posture. Its clear hexagonal barrel offers ergonomic comfort and style, while the retractable design ensures portability and protection. Trusted by millions with over 3,700 positive reviews, this pen delivers smooth, precise black ink ideal for note-taking, journaling, and creative expression.

Specifications

ASIN	B07KBN9YTK
Additional Features	Erasable, Retractable
Age Range Description	All age ranges
Animal Theme	no animal theme
Best Sellers Rank	#1,679 in Office Products ( See Top 100 in Office Products ) #5 in Fountain Pens
Body Shape	Round
Brand Name	Pilot
Closure Type	Retractable
Color	Clear
Customer Reviews	4.6 4.6 out of 5 stars (3,787)
Drill Point	Extra Fine
Global Trade Identification Number	00072838108166
Grip Type	Dotted
Hand Orientation	Ambidextrous
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 Color	Black
Item Diameter	0.3 Millimeters
Item Dimensions	6.9 x 20.6 x 15.7 centimeters
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	1_0_1_9mm
Manufacturer	Pilot Pen Corporation of America
Material Type	Plastic
Model Name	Kakuno
Model Number	Kakuno 10816
Recommended Uses For Product	Writing
Style	Retro
Subject Character	Smiley Face
Theme	Writing
UPC	072838108166
Unit Count	1 Count
Water Resistance Level	Not Water Resistant
Writing Instrument Form	Fountain Pen
Writing Technique	fountain pen

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R510

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

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