This article covers PFU HHKB Professionalシリーズ キートップセット 英語配列 中央印字 雪 PD-KB400KTYC.

Overview

The HHKB (Happy Hacking Keyboard) series from PFU is a cult favorite among programmers and enthusiasts thanks to its electrostatic capacitive switches and compact layout. This PD-KB400KTYC keycap set is an official replacement set for English-layout HHKB Professional models, featuring a "Snow White" color scheme with center-printed legends. It includes 60 keycaps in the same PBT material as the original, making it a perfect drop-in replacement for worn or damaged keys, or a way to experiment with a different look. Along with the keycaps, the package comes with a keycap puller and an instruction manual. While it is a simple accessory, the color—called "Yuki" (snow)—is a crisp, warm white that noticeably brightens the board compared to the standard off-white HHKB caps. The set is identical in shape and size to the stock keycaps, so compatibility is guaranteed with the listed models.

Connectivity & Compatibility

This keycap set is designed exclusively for English-layout (US ANSI) models of the HHKB Professional series. Specifically, it fits: HHKB Professional HHKB Professional2 HHKB Professional2 Type-S HHKB Professional BT HHKB Professional HYBRID Type-S HHKB Professional HYBRID * HHKB Professional Classic It does NOT work with Japanese-layout (JIS) models or any other keyboard brand. The keycaps are designed for the electrostatic capacitive switch mechanism used in HHKB boards. Installation is straightforward but requires patience: use the included puller to remove old caps, then press on the new ones. Be careful not to scratch the keycaps or switches during removal.

Product Info

Brand: HHKB (manufactured by PFU). Released around November 2022. The typical retail price in Japan is ¥6,600 (tax included) on . The package includes 60 keycaps, one keycap puller, and a multilingual manual. Individual keycaps are not sold separately. The warranty period is not explicitly stated, but as an official PFU accessory, it likely carries the same standard warranty as other PFU products. Market positioning: This is a mid-range replacement part—priced higher than generic keycaps but cheaper than a full custom set. It is the only pure-official option for HHKB Professional owners who want to refresh their keyboard's appearance or learn touch typing by switching to blank caps (blank versions are available separately, but this set provides center-printed caps as a starting point).

Best Use Cases

Long-time HHKB owners with shiny or greasy keycaps: The original keycaps on a well-used HHKB can develop a shiny surface and absorb oils over time. Replacing the full set with the Snow White caps gives the board a like-new look and feel. This is ideal for daily drivers that have seen years of use. However, if you only want to replace one broken key, you must buy the whole set, which may feel wasteful. Touch typing learners: Because the caps are center-printed, they are slightly easier to read than top-printed caps, but the low profile of the legend encourages looking at the screen. If you want to force yourself to type without looking, you can purchase a separate blank set and swap them out. The included puller makes this easy. HHKB enthusiasts who want a fresh aesthetic: The Snow White color is subtly different from the standard HHKB white—it is warmer and purer. This is a low-cost way to change the look of your board without modding the case or switches. Just be aware that if you mix this set with original caps, the color mismatch will be noticeable. Keyboard builders restoring a second-hand HHKB: If you bought a used HHKB with worn or missing caps, this set is the easiest way to restore full functionality with genuine parts. The set is identical to the original, so the restore will look factory-fresh.

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.