# PFU PD-KB400KTWC Keycap Set: HHKB Compatibility and Who Should Skip It > Official 60-cap replacement set for English-layout HHKB Professional boards. Covers the exact compatibility list, what center-printed legends change visually, and why it will not alter typing feel. Tags: keycap, hhkb, pfu, replacement-keycaps, us-layout, topre, pd-kb400ktwc Source: https://www.amazon.co.jp/dp/B0CNGN2ZGY Article page: https://web-autoai.com/articles/pfu-hhkb-professional-pd-kb400ktwc?lang=en Prices and ratings change over time — check the article page for the current values. --- PFU HHKB Professionalシリーズキートップセット英語配列中央印字白 PD-KB400KTWC — sold as the PFU HHKB Professional Series Keycap Set (English layout, center-printed, white) — is the official 60-piece replacement keycap set for English-layout HHKB Professional keyboards. This article covers exactly which boards it fits, what changes visually after the swap, and who should not buy it. ## Overview PD-KB400KTWC is a genuine PFU replacement set of 60 keycaps for English-layout (US) HHKB Professional keyboards. The legends are printed in the center of each cap, the color is white, and a keycap puller plus an instruction manual are included, so no extra tools are required. The short version: this set is for people who still love their HHKB but whose keycaps have worn out. The board itself lasts for years, but the plastic caps pick up shine and discoloration from finger oils within a few years of daily use. Restoring the look and the surface texture without replacing a multi-hundred-dollar keyboard is the real value here. As of June 2026, the Amazon. co. That is a strong score, but 47 is a small sample — typical for a replacement-parts SKU, and partly a reflection of the fact that a first-party part is expected to fit perfectly. ## Connectivity & Compatibility Supported models: - HHKB Professional - HHKB Professional2 - HHKB Professional2 Type-S - HHKB Professional BT - HHKB Professional HYBRID - HHKB Professional HYBRID Type-S - HHKB Professional Classic Not supported: Japanese-layout models, and any HHKB outside the Professional line such as HHKB Lite or HHKB Studio. This is where most purchase mistakes happen — the key count and key widths differ between layouts, so a JP-layout board simply cannot take this set. Telling them apart is easy. If there are extra conversion/kana keys flanking the space bar, it is a Japanese layout. If the space bar is bordered only by Alt/Meta keys and the Enter key is a single wide row, it is English layout. Check carefully if the board was bought used or issued by an employer. | Check | Requirement for this set | | --- | --- | | Layout | English (US) only | | Series | HHKB Professional family (incl. Classic / HYBRID / Type-S) | | Key count | All 60 caps replaced at once | | Tools | Included puller is sufficient | One more compatibility note: do not expect generic mechanical keyboard caps to work here. HHKB uses electrostatic capacitive switches whose cap mounting differs from the common Cherry MX cross stem, so sets advertised as "MX compatible" generally will not fit. Practically, your options are the official caps or third-party sets that explicitly state HHKB support. ## Product Info The specifications are straightforward: English (US) layout, center-printed legends, 60 keycaps, white, with a keycap puller and manual in the box. The 60-cap count means you get the complete alphanumeric, symbol, and modifier set — this is not a partial repair kit. co. The product launched around December 2023. Prices move with sales and stock, so confirm the current figure on the product page; the number here is a snapshot from the capture date. Against a new HHKB body costing several times that, refreshing the caps is cheap. But understand what it does not fix: if your complaint is key weight, actuation feel, or typing noise, that lives in the switches, not the caps, and a different model (Type-S, for example) is the answer. Overseas listings such as eBay vary by seller and add shipping and duties. Since the part is available at list price domestically, there is little reason to source it abroad. ## Center-Printed vs. Blank and Charcoal Options HHKB caps come in center-printed, upper-left-printed, and blank variants; this one is center-printed white. Center printing keeps legends visible rather than hidden under fingertips, upper-left printing preserves the classic HHKB face, and blank caps suit committed touch typists. A charcoal (sumi) English-layout set also exists in the same family. White shows discoloration more readily but has gentler legend contrast; charcoal hides grime but is harder to read in dim light. Mixing a white body with charcoal caps, or the reverse, is a legitimate customization path. ## Doing the Swap The job is not hard. Hook the included puller on opposite corners of a cap and lift straight up. The two rules are: never pull at an angle, and never yank. Angled force loads the slider sideways and can damage the switch. Photograph the board before you start so you can restore the layout without guessing. Wide keys such as the space bar are built differently — read that section of the manual first. Clean out dust while the caps are off. Expect roughly 15–30 minutes if you work carefully. ## Best Use Cases - **Long-time HHKB Professional owners** — shine, yellowing, and faded legends all reset without replacing the board. This is the core use case. - **Buyers of used HHKBs** — swapping in fresh caps removes the previous owner's wear, which matters for hygiene as much as looks. A used body plus new caps is a strong value combination. - **Users who want center-printed legends** — if your board has upper-left legends and you prefer center visibility, this is the way to change it. - **Owners of multiple HHKBs** — a way to standardize the appearance across boards from different generations. It is the wrong purchase if you want lighter or quieter keys, or colorful customization. The first is a switch issue; for the second, third-party sets offer far more variety. ## Notes Before Buying **Sold only as a 60-cap set. There is effectively no alternative, so keep the leftover caps as spares for next time. **Japanese layout is excluded. ** Confirm your board's layout before ordering — one minute of checking saves a return. **Legend position changes the look. ** Putting center-printed caps on a board that shipped with upper-left legends (HHKB Professional2, for example) makes it look like a different keyboard. "Genuine part" does not mean "identical to what you had. " **Typing feel barely changes. ** The surface texture improves once shine is gone, but weight, bottom-out, and sound come from the switches. **The swap is on you. ** Misusing the puller can damage caps or switches. Read the manual and never force a cap off. **Do not trust listing metadata blindly. ** Manufacturer, model number, and compatibility fields on Amazon product pages occasionally disagree with the physical item. Before ordering, visually confirm from the product images and title that all four attributes match: English layout, center-printed, white, PD-KB400KTWC. The charcoal and Japanese-layout variants carry nearly identical model numbers, which makes mix-ups easy. ## FAQ **Q. Will it fit a Japanese-layout HHKB? ** A. No. This set is English (US) layout only; key counts and widths differ. **Q. Does it work with HHKB Studio or HHKB Lite? ** A. No. Support is limited to English-layout HHKB Professional series boards (Professional / Professional2 / Professional2 Type-S / BT / HYBRID / HYBRID Type-S / Classic). **Q. Can I buy just one replacement key? ** A. No. It is sold only as a complete 60-cap set. **Q. Will typing feel change after the swap? ** A. Surface texture improves, but key weight and noise are determined by the switches and stay the same. **Q. Can I use generic mechanical keycaps on an HHKB? ** A. Generally no. HHKB's electrostatic capacitive switches use a different cap mount than Cherry MX-style stems, so choose caps that explicitly state HHKB compatibility. **Q. How long does the replacement take? ** A. About 15–30 minutes working carefully. Photograph the layout first if it is your first time. ### Product Disclosure (Amazon) - Manufacturer: HHKB - Seller: PFUダイレクト - Fulfilled by: PFUダイレクト - ASIN: B0CNGN2ZGY - Note: This article covers a manufacturer-made product based on Amazon listing details.