This article covers REALFORCE R3S キーボード 標準スイッチ 有線 フル 45g 日本語配列 ブラック R3SA31.

Overview

The REALFORCE R3S is a wired full-size keyboard that employs electrostatic capacitive switches, renowned for their unique typing feel. As the successor to the R2 series, it offers a standard 45g switch weight and a Japanese 112-key layout. A standout feature is the APC (Actuator Point Control) function, which allows users to adjust the key actuation point across four levels: 0.8mm, 1.5mm, 2.2mm, and 3mm. This enables fine-tuning for different typing styles or applications. Dedicated software also supports key remapping, making it versatile for office work, programming, and creative tasks. Unlike mechanical switches, electrostatic capacitive switches have no metal contacts, resulting in less wear over time and consistent feel for years. The 45g weight is light enough for extended typing sessions without fatigue, while the smooth, damped keystroke provides a satisfying tactile response. The plastic case features a matte black finish that looks premium and feels sturdy.

Connectivity & Compatibility

The R3S connects via a fixed USB cable and is compatible with Windows and macOS out of the box—no drivers required. It features a full-size Japanese JIS layout with 112 keys, including a numeric keypad. The APC and key mapping adjustments are managed through the Windows-only software utility. On macOS, the keyboard works as a standard input device, but customization features are limited to Windows.

Product Info

Launched in late 2022, the R3S is priced around ¥23,000, positioning it as an entry-to-mid-range model within the REALFORCE lineup. It comes with a 1-year manufacturer warranty. The package includes the keyboard, a fixed USB cable, and a manual. Available through and major electronics retailers. Despite its accessible price, it retains premium features like APC and software support, offering excellent value for those seeking electrostatic capacitive switches without breaking the bank. The R3S is the wired variant of the R3 series; the wireless R3 model costs more but offers Bluetooth connectivity.

Best Use Cases

Office workers and programmers who type for long hours: The electrostatic capacitive switches reduce finger fatigue, and the 45g weight is light enough for sustained use. APC allows setting a shallow actuation for faster typing. Users who prefer quiet keystrokes: Compared to mechanical switches, the R3S produces less noise, making it suitable for open offices or late-night work. Japanese input users: The JIS layout is optimized for kana and romaji input, and the full-size layout with numpad streamlines numeric data entry. Not ideal for gaming: Lacks gaming-specific features like high polling rates, macro keys, or RGB lighting. Also, no USB hub or pass-through port. For wireless needs, consider the R3 wireless model.

Product Disclosure (Amazon)

  • Manufacturer: REALFORCE
  • Seller: 【公式】REALFORCE Store
  • Fulfilled by: Amazon
  • ASIN: B0B3R84VG4
  • Note: This article covers a manufacturer-made product based on Amazon listing details.