The PFU HHKB Professional Series Keycap Set (English Layout, Center-Printed, Snow) PD-KB400KTYC is an official 60-piece replacement keycap set made specifically for English-layout HHKB boards. This article covers how to confirm compatibility, where the swap process trips people up, and who should not buy it.
Overview
This is a full official replacement keycap set for the English-layout (US ANSI) models of the HHKB (Happy Hacking Keyboard) Professional series, known for its electrostatic capacitive switches. The package contains 60 keycaps plus a keycap puller and an instruction manual, so the job can be finished the day it arrives.
The material is the same PBT resin used on the stock caps, and the shape and row heights match the originals, so you change the look without changing how the board feels.
The color is called "Snow," a white that differs in tone from the standard caps. The legends are center-printed, which places the characters more directly in your line of sight than front-printed styles.
Positioned as both a refresh part for worn caps and a cosmetic customization, it suits owners who want to revive an existing HHKB rather than replace the board.
The short version: if you have used an English-layout HHKB for years and the caps have gone shiny, or you want to restore a second-hand unit with genuine parts, this is an easy yes. If you cracked a single key, or you own a Japanese-layout model, it is not the right purchase — for reasons covered below.
Who It Fits and Who It Does Not
| Your situation | Verdict | Why |
|---|---|---|
| Years-old English-layout HHKB with shiny caps | Buy | 60 caps at once means no color mismatch |
| Restoring a used English-layout HHKB | Buy | The only genuine full-set option |
| Need to replace one key | Hold | No individual sales; set purchase only |
| Japanese (JIS) layout board | No | Key count and widths differ physically |
| Third-party Cherry MX keyboard | No | Designed for capacitive stems, not MX |
| Want a different typing feel | Little effect | Same material and shape as stock |
As the table shows, this part restores appearance and surface condition. If you want a different sound or actuation weight, that is a question of model (Type-S) or switch, not keycaps — aim your expectations in the right direction.
Compatibility Guide
Only English-layout models of the HHKB Professional series are supported: HHKB Professional, Professional2, Professional2 Type-S, Professional BT, Professional HYBRID, Professional HYBRID Type-S, and Professional Classic. Covering that many generations with a single set is a real advantage — an early board and a current HYBRID take the same caps.
Japanese-layout (JIS) models are not supported. JIS boards differ from ANSI in key count and key widths, so matching color does not make them fit; look for the separately offered JIS keycap sets instead.
The same applies to third-party Cherry MX boards: HHKB caps use a mounting shape built for the capacitive switch mechanism and are a different family from MX-compatible keycaps.
Three things to check before ordering. First, whether your HHKB is English or Japanese layout — the Enter key area makes this easy to tell.
Second, that this is keycaps only; switches, housing, and cables are not included. Third, that the swap is done at your own risk.
The included manual has the procedure and a key layout chart, so read it before you start.
Product Info
The brand is HHKB and the seller is PFU Direct. The price was ¥6,600 (tax included) as captured on 26 August 2026; prices move with revisions and sales, so check the product page for the current figure.
At 60 caps for ¥6,600, that works out to roughly ¥110 per key — higher than generic keycaps, but not unreasonable for a purpose-built genuine replacement part.
Reception is strong: 4.9 out of 5 stars across 46 reviews (98% positive), captured in June 2026.
The review count is modest, but that reflects a narrow buyer pool — English-layout HHKB owners — rather than weak reception. It reads as a part bought by people who knew exactly what they needed and got it.
The box contains 60 keycaps, one keycap puller, and an instruction manual with the swap procedure and a key layout chart. It launched around November 2022 and has remained available since.
Individual keycaps are not sold separately, so even a single needed cap means buying the full set. The warranty period is not published; confirm terms with the seller if that matters to you.
Note that marketplace listings sometimes show prices wildly out of line with a product of this class. This article does not use such figures.
If you see a listing far above the standard price, treat it as a reseller or a mismatched item.
Swap Procedure and Tips
The work is not hard, but care shows in the result. Photograph the keyboard before you start — once all 60 caps are off, the original arrangement is surprisingly easy to forget.
Combined with the included layout chart, that all but eliminates misplacement.
Seat the puller squarely and lift straight up without rocking it. Angled force can scratch the inner wall of the cap or the switch stem.
On wide keys such as Space and Shift, raise both sides gradually so force is not concentrated on one end. While the caps are off, clear dust from the housings — it reduces the gritty feel some boards develop.
Installing is just as simple: line the cap up squarely on the stem and press down evenly. Pressing at an angle causes caps to stop short and sit at uneven heights.
When you are done, press every key once to confirm it registers — under-seated caps show up here. Budget 15 to 30 minutes for the whole job.
Choosing Among the HHKB Keycap Sets
PFU offers this family in combinations of layout (English/Japanese), legend (center-printed/blank), and color (white, snow, wisteria, dandelion, and others). Narrow your choice in that order — layout, then legend, then color.
Get the layout wrong and it will not mount; get the legend wrong and daily use changes; color is purely taste.
This product is the English × center-printed × Snow combination — the answer for someone who wants legends but a brighter-looking board. If you already touch type and never look down, a blank set from the same family looks cleaner.
If you want the stock appearance with a fresh surface, the white center-printed set is the straightforward pick.
Mixing colors is possible, with one caveat: HHKB caps differ in height by row, so borrowing a cap from another row changes how your finger sits on it. Swap within the same row, or use only standalone keys like Esc or Enter as accents.
Best Use Cases
Long-time English-layout HHKB owners with shiny caps are the primary audience. PBT resists wear well, but after a few years the contact surfaces gain a gloss.
Replacing all 60 restores the surface to like-new while leaving the typing feel untouched.
Buyers of second-hand HHKBs also benefit. Used units hide wear and grime that photos do not show; swapping in genuine caps tidies the exterior without touching the internals.
Owners who want a brighter-looking board fit too. You change the impression without modding the case or switches, so there is no risk taken.
Center-printed legends are also easy to read if you are still learning the layout.
It is a poor fit for anyone chasing a different sound or actuation weight, anyone on a Japanese-layout model, or anyone who needs just one key — the first is the wrong product category, the other two are hard constraints.
Things to Check Before Buying
The biggest pitfall is buying the wrong layout. JIS owners who go by color and a glance at the model number do order the ANSI set by mistake.
As a guide, KB400-series part numbers target English layout and KB420-series target Japanese, but do not rely on the number alone — match the listing's layout description against your actual keyboard.
Next, color mismatch. "Snow" is not the same white as the standard caps.
Replace only some keys and the difference shows depending on the light. If appearance is the goal, plan on swapping all 60 rather than doing it piecemeal.
No individual sales is worth accepting up front. A single broken cap still means a full set, which is expensive as a one-off repair.
On the other hand, if you plan to keep the board for years, the leftovers become spares.
The typing feel does not change. Material and shape match the stock caps, so buying this hoping for quieter or heavier keys will disappoint.
For quiet operation look at Type-S models; for weight, look at the switch spec.
Finally, about listing data. On sites like Amazon, registered details such as manufacturer, seller, and part number sometimes disagree with the actual product, and marketplace listings can carry prices far off the standard level.
Before ordering, verify the product image, the title, and the layout description all point to the same item. Discovering a layout mismatch after delivery is the single most common failure with this kind of accessory.
FAQ
Q. Will it fit a Japanese-layout HHKB? A.
No. JIS boards differ in key count and widths, so it will not physically fit.
Choose the set offered for Japanese layout instead.
Q. Can I use it on a Cherry MX keyboard? A.
No. HHKB caps are built for the capacitive switch mechanism and are a separate family from MX-compatible keycaps.
Q. Can I buy a single keycap? A.
No. Individual sales are not offered; one cap still means the 60-piece set.
At the captured price of ¥6,600, that is roughly ¥110 per key.
Q. Does swapping change how it types? A.
Barely. Both the PBT material and the shape match the stock caps.
Some people notice less finger slip once the gloss is gone, but weight and sound are unchanged.
Q. How long does the swap take? A.
Roughly 15 to 30 minutes including checks, using the included puller and layout chart. Photograph the board first to avoid misplacing caps.
Q. Can I mix them with the standard white caps? A.
"Snow" differs in tone from the standard color, so mixing is visible. Use it deliberately as an accent, or swap the full set for a uniform look.
Product Disclosure (Amazon)
- Manufacturer: HHKB
- Seller: PFUダイレクト
- Fulfilled by: PFUダイレクト
- ASIN: B0BFH9QJPJ
- Note: This article covers a manufacturer-made product based on Amazon listing details.
