--- product_id: 103052070 title: "Kakuno Fountain Pen, Clear Barrel, Extra Fine Nib, 0.3mm" brand: "pilot" price: "¥4066" currency: JPY in_stock: true reviews_count: 13 category: "Pilot" url: https://www.desertcart.jp/products/103052070-kakuno-fountain-pen-clear-barrel-extra-fine-nib-0-3mm store_origin: JP region: Japan --- # Clear Barrel for Ink Visibility Hexagonal Ergonomic Grip 0.3mm Extra Fine Nib Kakuno Fountain Pen, Clear Barrel, Extra Fine Nib, 0.3mm **Brand:** pilot **Price:** ¥4066 **Availability:** ✅ In Stock ## Summary > 🖋️ Write Sharp, Stand Out — The Pen That Means Business ## Quick Answers - **What is this?** Kakuno Fountain Pen, Clear Barrel, Extra Fine Nib, 0.3mm by pilot - **How much does it cost?** ¥4066 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/103052070-kakuno-fountain-pen-clear-barrel-extra-fine-nib-0-3mm) ## Best For - pilot enthusiasts ## Why This Product - Trusted pilot brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Comfort Meets Control:** Hexagonal design with dotted grip ensures fatigue-free writing and prevents rolling off your desk. - • **Ink Level at a Glance:** Transparent barrel lets you monitor ink supply effortlessly—never run dry mid-thought again. - • **Ready for Every Ink Style:** Compatible with cartridges and converters, supporting your favorite bottled inks for personalized expression. - • **Precision Writing, Every Time:** Extra fine 0.3mm nib delivers crisp, clean lines perfect for detailed notes and creative journaling. - • **Beginner-Friendly with Pro Appeal:** Smiley face nib guides perfect pen angle, ideal for novices and seasoned writers alike. ## Overview The Pilot Kakuno Fountain Pen features an extra fine 0.3mm nib with a unique smiley face design to guide perfect writing posture. Its clear barrel offers full ink visibility, while the hexagonal, dotted grip ensures ergonomic comfort and prevents rolling. Lightweight and ambidextrous, it supports both cartridges and converters, making it the ideal starter pen for professionals and creatives seeking precision and style in everyday writing. ## Description pilot kakuno fountain pen medium nib converter cartridges ink calligraphy journaling drawing office school college beginner smooth paper supplies work business professional signature executive gifts art sketch Review: Kaküno Demonstrator pen, Medium NIB - an Exceptional pen, a fantastic deal - Kaküno Demonstrator pen, Medium NIB. The pen arrived in a large cardboard display box instead of the typical loosely packed small air-bubble envelope. I had no idea what it could possibly be. The box looked as if the inner box slides out. It does not. The box has a magnetically hinged flap. Inside the gold embossed "goldspot" gift box were 5 Iroshizuku ink sample vials, the Kaküno pen in a foam cutout, a Pilot Black ink long cartridge, a Pilot CON-40 ink Converter, an instruction leaflet. I was pleasantly surprised, bordering on shock; Christmas arrived early this year. This is my second Kaküno fountain pen, so I am intimately familiar with it. My first was a dry writer that needed extensive tuning. Knowing what it had taken to get that pen to write wet, I threw all caution to the wind, and without first flushing the pen out as I would normally do, I syringe filled a spare Pilot cartridge with Robert Oster Aqua ink, waited a minute to let the ink saturate the Feed Follower fins, and put the pen to paper. It wrote perfectly right out of the box - it layed down a nicely defined Fine saturated dark line; the NIB had minimal feedback (the was no dragginess), was not scratchy, did not have "catchy" spots that would malform characters or cause lettering to bunch up. It wrote as well as my tuned Kaküno, meaning perfectly. There were no hard starts, no false starts, no skipping, no blobbing; dotting "i"s and crossing "t"s were perfect. The Kaküno is not a "Juicey" pen, though; it is moderately wet, bordering on the dry side, so moderate flow and wet bottled inks are suggested. A Japanese "Medium" NIB is about the same width as an European, or Western, "Fine". The pen is ergonomic, has no sharp edges. The Section has slight sloping facets that provide a natural fingertip hold; the barrel stepdown is not obtrusive, not objectionable, not irritating; the Section grip is over an inch long. The plastic is very high quality, it doesn't feel cheap, as if it could crack by just looking at it. The pen does not dry out in under 60 seconds when left laying on the desk uncapped, in fact it doesn't dry out even after 4 minutes. Excellent! Exceptional! You will not need to get into the habit of continually capping and uncapping the pen to prevent the pen from drying out. The air holes in the cap help to minimize NIB creep by minimizing the air vacuum that would suck ink onto the NIB as the pen is uncapped. Don't fill in the 3 cap holes. The NIB unit can be rotated to fine tune one's hold - very important for left handed writers, especially "lefties" that crane their hand at awkward angles to write "from above". If you are in the habit of storing your pens NIB pointing up, the two barrel end holes will need to be filled in to prevent the NIB from drying out overnight. A new user should not attempt doing so (and neither should they worry about it) as it will be beyond their expertise to do so without damaging the barrel. Do NOT store the pen NIB down as the ink WILL drain into the cap and make a big mess. Horizontal storing is suggested; buy a nice fountain pen case, or just use a rectangular eye glass case layered with soft cotton or foam. When picked up from horizontal storage the pen will write perfectly with the very first stroke. There is no metal clip to prevent the pen from rolling, but neither is there the irritating metal clanking sound a Lamy metal clip makes, for example. The hexagonal facets on the cap and barrel will prevent most rolling, the small Cap stub should bring it to a full stop. Capped, the centre of balance is exactly where the cap meets the barrel; uncapped, the centre of balance is exactly at the half way mark of the pen. The pen is neither too light nor too heavy. The cap weighs 4 grams, the body weighs 7 grams, slightly more when inked. Posting the cap is possible and is suggested; the cap edge isn't sharp and not likely to irritate the web of the hand; no pressure is needed to keep the cap firmly in place. A syringe refillable Pilot long ink cartridge holds ~0.9ml, Pilot Namiki IC100 cartridges hold ~0.8ml, the Con-70 holds ~1.0ml, the Pilot Petite short cartridge holds ~0.6ml, the supplied CON-40 converter holds ~0.4ml. The Cursive Italic NIB from the Pilot Plumix can be transplanted into the Kakuno, and while listed as being 1.0mm it is closer to an European Medium, ~0.7mm. To take full advantage of the 5 goldspot supplied ink vials you will need to get into syringe refilling, although I suppose you could dip the supplied converter into the ink vial to fill up, but you will need to be extremely careful when doing so. Always put a dab of Silicone GREASE on plastic threads to prevent cracking whenever you re-ink the pen. This an EXCEPTIONAL starting pen. I prefer it to my TWSBI Eco, Wingsung 698, Lamy Vista, Jinhao 992, and Jinhao X450. The Kaküno is the pen I most reach for, the one that is always "at the ready" on my desktop. Thank you, GoldSpot - you "hit it out of the Park." And thank you desertcart. The package arrived in perfect condition and in a timely manner. Merchant rating: 5 stars; great service. Review: Great for Beginners - Inexpensive, Writes well - This is such a great little pen (and fun to write with too!) for the amazingly low desertcart price of approximately $10. So much to like here: this particular pen has a medium nib, which is my favorite for this pen. It can use and ink cartridge or a converter and as you can see, this one has a converter; it’s almost out of ink but from the writing sample you can see I have use bottled ink with the converter (Diamine Emerald). The barrel and cap have angled sides, preventing it from rolling away like a round barrel can; the cap snaps off and seals tightly; the clear barrel shows the ink color and volume. It is extremely lightweight acrylic, which means I can write with it for long periods of time and not have hand fatigue. It feels good in my small hand posted or unposted, although I like the balance better when it is posted. This reliable little pen is a great way to jump into fountain pens for beginners, especially children. This is the second one I’ve purchased for myself, just because it’s fun, inexpensive and writes so well. Highly recommend. ## Features - Pilot Kakuno Fountain Pen: The Pilot fountain pen Kakuno is designed for novice and experienced fountain pen users in mind, the Kakuno features a smiley face on the finely crafted nib to ensure the perfect writing position - Variety of Nib Sizes and Colors: The Kakuno comes in an Extra Fine point nib, with pink, purple or turquoise caps and white barrels. The hexagonal design makes this fountain pen easy to hold - Express Yourself: Whether you're bullet journaling or working on other creative projects, you'll want to try our full line of Pilot pens including calligraphy and hand lettering pens, brush markers, fountain pens for journaling and more - Trusted Quality: We've been making pens for over 100 years. Whether you're taking notes, stocking up on school or office supplies, or writing in a bullet journal, Pilot has the perfect writing pen for you - Power To The Pen: Pilot makes exceptional writing instruments to suit all your needs. We have fountain pens for writing, ballpoint, retractable, erasable and gel ink pens, plus whiteboard markers and more for every writing style ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07KBN9YTK | | Additional Features | Capped | | Age Range (Description) | Above 8 years | | Age Range Description | Above 8 years | | Best Sellers Rank | #2,595 in Office Products ( See Top 100 in Office Products ) #3 in Fountain Pens | | Body Shape | Hexagonal | | Brand | PILOT | | Brand Name | PILOT | | Closure Type | Retractable | | Color | Clear Barrel | | Customer Reviews | 4.6 out of 5 stars 4,464 Reviews | | Drill Point | Extra Fine | | Global Trade Identification Number | 00072838108166 | | Grip Type | Dotted | | Hand Orientation | Ambidextrous | | Hardness | 1 | | 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 Dimensions | 2.7 x 8.1 x 6.2 inches | | Item Type Name | Kakuno Fountain Pen, Extra Fine Nib, Clear Barrel, Clear Cap, Black Ink, Single Pen (10816) | | Item Weight | 9.07 g | | Line Size | 0_3mm millimeters | | Manufacturer | Pilot Pen Corporation of America | | Material | Plastic | | Material Type | Plastic | | Model Name | Pilot | | Model Number | Kakuno 10816 | | Recommended Uses For Product | Writing | | Style | Extra Fine Nib | | Subject Character | Smiley Face | | Theme | Writing | | UPC | 072838108166 | | Unit Count | 1 Count | | Warranty Description | see packaging | | Writing Instrument Form | Fountain Pen | | Writing Technique | Fountain Pen | ## Product Details - **Age Range (Description):** Above 8 years - **Brand:** PILOT - **Color:** Clear Barrel - **Ink Color:** Black - **Writing Instrument Form:** Fountain Pen ## Images ![Kakuno Fountain Pen, Clear Barrel, Extra Fine Nib, 0.3mm - Image 1](https://m.media-amazon.com/images/I/61m43WgQJaL.jpg) ## Available Options This product comes in different **Color, Size, Style** options. ## Questions & Answers **Q: Can you refill it or is it disposable?** A: You can refill this, with either a Pilot converter or with a Pilot cartridge. Pilot uses proprietary converters and cartridges. **Q: Can the Con-40 converter be used in this pen?** A: The Con-B, Con-40 and the Con-70 can all be used in the Pilot Kakuno. **Q: Is the ink waterproof and archival?** A: 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. **Q: What size cartridge does this pen take?** A: The PILOT KAKUNO FP takes a PILOT NAMIKI IC100 FOUNTAIN PEN INK CARTRIDGE or a PILOT CON 40 converter. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Kaküno Demonstrator pen, Medium NIB - an Exceptional pen, a fantastic deal *by W***N on October 19, 2019* Kaküno Demonstrator pen, Medium NIB. The pen arrived in a large cardboard display box instead of the typical loosely packed small air-bubble envelope. I had no idea what it could possibly be. The box looked as if the inner box slides out. It does not. The box has a magnetically hinged flap. Inside the gold embossed "goldspot" gift box were 5 Iroshizuku ink sample vials, the Kaküno pen in a foam cutout, a Pilot Black ink long cartridge, a Pilot CON-40 ink Converter, an instruction leaflet. I was pleasantly surprised, bordering on shock; Christmas arrived early this year. This is my second Kaküno fountain pen, so I am intimately familiar with it. My first was a dry writer that needed extensive tuning. Knowing what it had taken to get that pen to write wet, I threw all caution to the wind, and without first flushing the pen out as I would normally do, I syringe filled a spare Pilot cartridge with Robert Oster Aqua ink, waited a minute to let the ink saturate the Feed Follower fins, and put the pen to paper. It wrote perfectly right out of the box - it layed down a nicely defined Fine saturated dark line; the NIB had minimal feedback (the was no dragginess), was not scratchy, did not have "catchy" spots that would malform characters or cause lettering to bunch up. It wrote as well as my tuned Kaküno, meaning perfectly. There were no hard starts, no false starts, no skipping, no blobbing; dotting "i"s and crossing "t"s were perfect. The Kaküno is not a "Juicey" pen, though; it is moderately wet, bordering on the dry side, so moderate flow and wet bottled inks are suggested. A Japanese "Medium" NIB is about the same width as an European, or Western, "Fine". The pen is ergonomic, has no sharp edges. The Section has slight sloping facets that provide a natural fingertip hold; the barrel stepdown is not obtrusive, not objectionable, not irritating; the Section grip is over an inch long. The plastic is very high quality, it doesn't feel cheap, as if it could crack by just looking at it. The pen does not dry out in under 60 seconds when left laying on the desk uncapped, in fact it doesn't dry out even after 4 minutes. Excellent! Exceptional! You will not need to get into the habit of continually capping and uncapping the pen to prevent the pen from drying out. The air holes in the cap help to minimize NIB creep by minimizing the air vacuum that would suck ink onto the NIB as the pen is uncapped. Don't fill in the 3 cap holes. The NIB unit can be rotated to fine tune one's hold - very important for left handed writers, especially "lefties" that crane their hand at awkward angles to write "from above". If you are in the habit of storing your pens NIB pointing up, the two barrel end holes will need to be filled in to prevent the NIB from drying out overnight. A new user should not attempt doing so (and neither should they worry about it) as it will be beyond their expertise to do so without damaging the barrel. Do NOT store the pen NIB down as the ink WILL drain into the cap and make a big mess. Horizontal storing is suggested; buy a nice fountain pen case, or just use a rectangular eye glass case layered with soft cotton or foam. When picked up from horizontal storage the pen will write perfectly with the very first stroke. There is no metal clip to prevent the pen from rolling, but neither is there the irritating metal clanking sound a Lamy metal clip makes, for example. The hexagonal facets on the cap and barrel will prevent most rolling, the small Cap stub should bring it to a full stop. Capped, the centre of balance is exactly where the cap meets the barrel; uncapped, the centre of balance is exactly at the half way mark of the pen. The pen is neither too light nor too heavy. The cap weighs 4 grams, the body weighs 7 grams, slightly more when inked. Posting the cap is possible and is suggested; the cap edge isn't sharp and not likely to irritate the web of the hand; no pressure is needed to keep the cap firmly in place. A syringe refillable Pilot long ink cartridge holds ~0.9ml, Pilot Namiki IC100 cartridges hold ~0.8ml, the Con-70 holds ~1.0ml, the Pilot Petite short cartridge holds ~0.6ml, the supplied CON-40 converter holds ~0.4ml. The Cursive Italic NIB from the Pilot Plumix can be transplanted into the Kakuno, and while listed as being 1.0mm it is closer to an European Medium, ~0.7mm. To take full advantage of the 5 goldspot supplied ink vials you will need to get into syringe refilling, although I suppose you could dip the supplied converter into the ink vial to fill up, but you will need to be extremely careful when doing so. Always put a dab of Silicone GREASE on plastic threads to prevent cracking whenever you re-ink the pen. This an EXCEPTIONAL starting pen. I prefer it to my TWSBI Eco, Wingsung 698, Lamy Vista, Jinhao 992, and Jinhao X450. The Kaküno is the pen I most reach for, the one that is always "at the ready" on my desktop. Thank you, GoldSpot - you "hit it out of the Park." And thank you Amazon. The package arrived in perfect condition and in a timely manner. Merchant rating: 5 stars; great service. ### ⭐⭐⭐⭐⭐ Great for Beginners - Inexpensive, Writes well *by S***S on July 8, 2025* This is such a great little pen (and fun to write with too!) for the amazingly low Amazon price of approximately $10. So much to like here: this particular pen has a medium nib, which is my favorite for this pen. It can use and ink cartridge or a converter and as you can see, this one has a converter; it’s almost out of ink but from the writing sample you can see I have use bottled ink with the converter (Diamine Emerald). The barrel and cap have angled sides, preventing it from rolling away like a round barrel can; the cap snaps off and seals tightly; the clear barrel shows the ink color and volume. It is extremely lightweight acrylic, which means I can write with it for long periods of time and not have hand fatigue. It feels good in my small hand posted or unposted, although I like the balance better when it is posted. This reliable little pen is a great way to jump into fountain pens for beginners, especially children. This is the second one I’ve purchased for myself, just because it’s fun, inexpensive and writes so well. Highly recommend. ### ⭐⭐⭐⭐⭐ Excellent purchase *by V***Z on May 6, 2026* This pen is stunning. It’s cool looking AND it writes like a dream. I never thought I would be this fond of a 12 dollar plastic pen. It really is a dream come true. It’s not a Mont Blanc but it is perfect for what it is. I’m certain it’s the best plastic pen on the planet. My search has finally come to an end. My standards are HIGH. I purchased the fine tip nib and I am so glad I did. Great purchase. Great value. ## Frequently Bought Together - PILOT Kakuno Fountain Pen, Clear Barrel, Extra Fine Nib (10816) - Pilot Fountain Pen Converter (CON-70) - Pilot Fountain Pen Ink Converter Screw Type (CON-40) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/103052070-kakuno-fountain-pen-clear-barrel-extra-fine-nib-0-3mm](https://www.desertcart.jp/products/103052070-kakuno-fountain-pen-clear-barrel-extra-fine-nib-0-3mm) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-19*