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

🔍Clear barrel for ink visibility

✒️0.3mm extra fine nib precision

🖐️Hexagonal grip for ergonomic hold

¥8117

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Description

✍️ Write smart, write sharp — join the Kakuno club!

SEE YOUR INK FLOW - Transparent barrel lets you monitor ink levels, so you never run dry mid-idea.
COMFORT MEETS CONTROL - Hexagonal, dotted grip design ensures fatigue-free writing sessions for left- and right-handers alike.
TRUSTED CRAFTSMANSHIP - Backed by over 100 years of Pilot’s pen-making expertise, combining reliability with style.
PRECISION WRITING EVERY TIME - Extra fine 0.3mm nib delivers crisp, clean lines perfect for detailed notes and creative journaling.
BEGINNER FRIENDLY WITH A SMILE - Smiley face on nib guides perfect pen angle, making it ideal for fountain pen newcomers and pros.

The Pilot Kakuno Fountain Pen features an extra fine 0.3mm nib with a unique smiley face guide, a clear barrel for ink visibility, and an ergonomic hexagonal grip. Designed for both beginners and experienced users, this lightweight, ambidextrous pen offers precision and comfort backed by Pilot’s century-long legacy in quality writing instruments.

Specifications

ASIN	B07KBN9YTK
Age Range Description	All age ranges
Best Sellers Rank	38,908 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 169 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 (3,726)
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	9 g
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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¥8117

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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