Fountain Pens
Platinum Preppy vs Pilot Kakuno
Two pens under ten dollars, from two Japanese makers, both publishing a nib width in millimeters. They are more different than the price suggests.
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These are the two pens that get handed to beginners more than any others at this price, and the choice between them is usually made on color. It should be made on two specifications, both of which are published.
What they have in common
More than you would expect, and it is worth clearing out of the way first.
- Both publish a nib width in millimeters, which almost no European maker at any price does. Platinum names the Preppy by width - 02 is 0.2 mm, 03 is 0.3 mm - and Pilot states 0.3 mm for the Kakuno Fine.
- Both are Japanese, so both run narrower than a European pen of the same letter grade.
- Both use proprietary cartridges. Neither takes the international standard, and each brand's converter is a separate purchase.
- Both are plastic, light, and unembarrassing to lose.
The two differences that decide it
| Platinum Preppy | Pilot Kakuno | |
|---|---|---|
| Cap | Slip-and-seal inner cap, designed to stop the nib drying out | Conventional snap cap |
| Grip section | Round, unremarkable | Molded triangular guide, with a smiley face on the nib |
| Published width | 0.2 mm (02) or 0.3 mm (03) | 0.3 mm (Fine) |
| Body | Transparent - you can see the cartridge | Opaque or clear depending on version |
| Price | The cheaper of the two | Slightly more |
The pens
Quick picks
Ranked for the beginner buying their first setup. Every pick names who it is wrong for.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 |  Platinum Preppy The cheapest honest fountain pen on the shelf, and the only one on this page you can lose without minding. | Finding out whether you like fountain pens at all | $6.84 · View on Amazon #ad Price as of October 18, 2026. How this is funded |
| 2 |  Pilot Kakuno A hexagonal barrel that will not roll off a desk, a smiling face on the nib to show which way is up, and a genuinely good Pilot nib underneath. | Younger writers and small handwriting | $9.90 · View on Amazon #ad Price as of October 18, 2026. How this is funded |
| 3 |  Platinum Plaisir The Preppy's nib and its excellent cap seal, wrapped in anodized aluminum instead of cracking plastic. | A Preppy nib in a body that survives a bag | $24.24 · View on Amazon #ad Price as of October 18, 2026. How this is funded |
| 4 |  Pilot Metropolitan A brass-bodied pen with a nib far better than the price suggests, and the one most consistently handed to beginners. | The default first pen | $27.37 · View on Amazon #ad Price as of October 18, 2026. How this is funded |
1. Finding out whether you like fountain pens at all
Platinum Preppy
The cheapest honest fountain pen on the shelf, and the only one on this page you can lose without minding.
#ad Price as of October 18, 2026. How this is funded
Platinum publishes the nib width in millimeters, which almost nobody else in this category does. That single fact makes the Preppy the cleanest reference point on the whole site: when we say a Japanese Fine is about 0.3 mm, this is the pen we can point at.
The slip-and-seal cap is the other reason it matters. Platinum's cap mechanism keeps the nib from drying out for months, so a Preppy left in a drawer usually writes on the first stroke — the failure that puts most beginners off fountain pens for good.
It is still a cheap plastic pen. The cap cracks if you post it hard, and the body is not built to survive a bag full of keys.
| Nib width in mm | Platinum names the nib by its width: 02 is 0.2 mm, 03 is 0.3 mmOne of the very few makers that states a millimeter figure at all.Source: Platinum Preppy 02, 0.2 mm (retail listing, read 2026-09-01) |
|---|---|
| Nib grades offered | 02 extra fine and 03 fine, in several barrel colorsSource: Platinum Preppy, Fine (retail listing, read 2026-09-01) |
| Filling | Platinum proprietary cartridge; a Platinum converter fits the same barrelSource: Platinum Carbon ink cartridges (retail listing, read 2026-09-01) |
| Body | Transparent plastic, snap capSource: Platinum Preppy, Fine (retail listing, read 2026-09-01) |
What it does well
- The maker actually publishes the nib width in millimeters
- Cap seal genuinely resists drying out between uses
- Cheap enough to be a test rather than a commitment
What it does not
- Plastic cap cracks under pressure
- Proprietary Platinum cartridges
- No weight to it — feels like the disposable it nearly is
Skip this if you want a pen that feels substantial in the hand, or if you plan to carry it loose in a bag every day.
2. Younger writers and small handwriting
Pilot Kakuno
A hexagonal barrel that will not roll off a desk, a smiling face on the nib to show which way is up, and a genuinely good Pilot nib underneath.
#ad Price as of October 18, 2026. How this is funded
The Kakuno was designed for Japanese schoolchildren, and every design decision follows from that: hexagonal so it stays put, a face embossed on the nib so you can see at a glance whether you are holding it upside down, and a nib tuned to be forgiving rather than fast.
It shares a nib family with the Metropolitan, so the writing experience is closer to that pen than the price gap suggests. What you give up is the brass body and the sense of occasion.
The cap does not post, which is a real annoyance for anyone with large hands — you either hold a slightly short pen or find somewhere to put the cap.
| Line width | 0.3 mm on the Fine nibStated in the listing's own product attributes.Source: Pilot Kakuno, Fine (retail listing, read 2026-09-01) |
|---|---|
| Nib grades offered | Extra Fine, Fine, MediumSource: Pilot Kakuno, Extra Fine 0.3 mm (retail listing, read 2026-09-01) |
| Body | Hexagonal plastic barrel; the cap does not postSource: Pilot Kakuno, Fine (retail listing, read 2026-09-01) |
| Filling | Pilot proprietary cartridge, or a Pilot CON-40 converterSource: Pilot CON-40 converter (retail listing, read 2026-09-01) |
What it does well
- The maker publishes a millimeter figure for the nib
- Hexagonal barrel does not roll
- Same Pilot nib quality as pens costing twice as much
What it does not
- The cap does not post on the barrel
- Unmistakably a children's pen to look at
- Proprietary Pilot cartridges
Skip this if the pen has to look serious on a desk at work, or if you have large hands and need to post the cap.
3. A Preppy nib in a body that survives a bag
Platinum Plaisir
The Preppy's nib and its excellent cap seal, wrapped in anodized aluminum instead of cracking plastic.
#ad Price as of October 18, 2026. How this is funded
The Plaisir is the answer to the one real complaint about the Preppy: the body. Same nib, same slip-and-seal cap that resists drying, but in metal.
That cap seal is the reason to care. A pen that writes on the first stroke after three weeks in a drawer is a pen that gets used, and Platinum's cap does that better than anything else at this price.
You are paying several times the Preppy's price for a body, not for a better nib. Whether that is worth it depends entirely on whether you carry the pen.
| Nib | Fine; the same nib unit family as the Platinum PreppySource: Platinum Plaisir, Fine (retail listing, read 2026-09-01) |
|---|---|
| Body | Anodized aluminumSource: Platinum Plaisir, Fine (retail listing, read 2026-09-01) |
| Filling | Platinum proprietary cartridge; a Platinum converter fitsSource: Platinum fountain pen converter (retail listing, read 2026-09-01) |
| Nib width in mm | 0.3 mm (Fine)Source: Platinum Plaisir, Fine nib (retail listing, read 2026-09-27) |
| Nib material | Stainless steelSource: Platinum Plaisir, Fine nib (retail listing, read 2026-09-27) |
| Cap | Slip and Seal mechanism, which Platinum states prevents ink drying outSource: Platinum Plaisir, Fine nib (retail listing, read 2026-09-27) |
What it does well
- Cap seal genuinely resists drying between uses
- Metal body at a modest price
- Nib shared with a pen whose width Platinum actually publishes
What it does not
- Costs several times the Preppy for the same writing experience
- Proprietary Platinum cartridges
- Colors are limited and loud
Skip this if the pen will live on a desk — a Preppy writes identically for a fraction of the money.
4. The default first pen
Pilot Metropolitan
A brass-bodied pen with a nib far better than the price suggests, and the one most consistently handed to beginners.
#ad Price as of October 18, 2026. How this is funded
The brass body is the reason this pen feels like it costs more than it does. It gives the pen weight in the hand and a cold, solid grip section, which is the single thing most people notice moving up from a plastic school pen.
The nib is a Japanese Fine. That matters more than the letter suggests: Japanese grades run narrower than German ones, so a Pilot Fine lays a line closer to what a European maker would call extra fine. If you write small or on thin paper, that narrowness is doing you a favor.
The catch is filling. The Metropolitan takes Pilot's own cartridges, not the international standard ones every other brand shares, and the converter you need to use bottled ink is a separate purchase.
| Nib grades offered | Fine and Medium (stub also sold separately)Source: Pilot Metropolitan, Fine (retail listing, read 2026-09-01) |
|---|---|
| Nib width in mm | Not publishedPilot does not state a millimeter width for the Metropolitan nib in this listing. Japanese Fine runs narrower than a German Fine — see the nib size guide. |
| Body | Brass barrel, painted finishSource: Pilot Metropolitan, Fine (retail listing, read 2026-09-01) |
| Filling | Pilot proprietary cartridge, or a Pilot CON-40 / CON-70 converter (sold separately)Source: Pilot CON-40 converter (retail listing, read 2026-09-01) |
| In the box | Pen with one black ink cartridge and a squeeze converterSource: Pilot Metropolitan, Fine (retail listing, read 2026-09-01) |
What it does well
- Brass body at a plastic-pen price
- Japanese Fine nib puts down a narrow, controlled line
- Extremely widely stocked, so replacements and spares are easy
What it does not
- Proprietary Pilot cartridges, not the international standard
- Converter is sold separately
- The painted finish scuffs if you pocket-carry it with keys
Skip this if you want to use bottled ink on day one without a second purchase, or if you already know you prefer a broad, wet line.
The cap seal is the Preppy's real argument
Fountain pens dry out. A pen left inked and unused for a few weeks will often refuse to start, and for a beginner that is the moment the hobby stops - the pen gets labeled unreliable and goes in a drawer.
Platinum's slip-and-seal cap exists specifically to slow that down, and it is the reason the Preppy turns up on this site more often than a few-dollar plastic pen otherwise would. If your pen use is occasional rather than daily, that single feature matters more than anything else on this page.
The same mechanism appears in the Platinum Plaisir, which is the aluminum-bodied version of the same pen for people who want it to feel less disposable.
The Kakuno's grip is the better teaching tool
The Kakuno's section is molded with flats that guide the fingers into a tripod grip, and there is a face printed on the nib that is right-way-up only when the pen is correctly rotated. Both are aimed at children, and both work on adults who have never been taught to hold a pen.
It is a gentler version of what the LAMY Safari does. The Safari's triangle permits exactly one hand position and divides opinion sharply; the Kakuno guides rather than forces.
If you are buying a first pen for a child, that combination - a guided grip, a published narrow nib and a price that makes loss survivable - is hard to beat.
Which to buy
- Occasional use, or a pen that lives in a bag: the Preppy, for the cap seal.
- A child, or an adult fixing their grip: the Kakuno.
- The narrowest possible line: the Preppy 02 at 0.2 mm, which is narrower than anything Pilot publishes here.
- You want it to feel like a real object: neither - step up to the Pilot Metropolitan, which is brass and costs about three times as much.
And the honest note: at this price, buy both. Together they cost less than one mid-range pen, and owning both answers the grip and cap questions permanently.
Questions people actually ask
Is the Platinum Preppy or the Pilot Kakuno better?
The Preppy if the pen will sit unused - its slip-and-seal cap is designed to stop the nib drying out. The Kakuno if you want the better-finished pen or are buying for a child, because its molded grip guides the fingers into a correct hold.
What nib widths do the Preppy and Kakuno publish?
Platinum names the Preppy's nibs by width: the 02 is 0.2 mm and the 03 is 0.3 mm. Pilot states 0.3 mm for the Kakuno Fine. Publishing a millimeter figure at all is unusual and is why both appear so often on this site.
Do the Preppy and Kakuno take the same cartridges?
No. Platinum and Pilot each use their own proprietary cartridge, and neither takes the international standard. Each brand's converter is also a separate purchase.
Which is better for a child?
The Kakuno. Its grip section is molded to guide a tripod hold and the face printed on the nib only looks right when the pen is rotated correctly - both aimed at young writers, and both genuinely useful for adults too.
Why does the Preppy cap matter so much?
Because a dried-out pen is the most common reason beginners give up. Platinum's inner cap seals the nib chamber and slows evaporation, so a pen left inked for weeks is far more likely to start when you pick it up.