This article covers 【国内正規品】Keychron B1 Pro ウルトラスリム ワイヤレスキーボード.

Overview

The Keychron B1 Pro is the latest ultra-slim wireless keyboard from the brand, featuring a scissor-switch mechanism and a full JIS layout with kana legends. At roughly 6mm thick, it supports three connection modes—2.4GHz wireless, Bluetooth 5.2, and USB-C wired—and runs on a single AA battery for up to 1,200 hours of use. ZMK firmware customization is also supported, making it a versatile choice for both office and mobile setups.

Connectivity & Compatibility

This keyboard connects via a 2.4GHz USB-A dongle, Bluetooth 5.2, or a USB-C cable. It works with Windows, macOS, Linux, iOS, and Android, and switching between devices is handled by a dedicated key. The JIS layout with printed kana means Japanese users can type without any layout adjustments.

Product Info

Released in late 2024, the B1 Pro is available through Japan and other domestic channels. Pricing sits around ¥7,000–¥8,000, placing it in the entry-to-mid-range wireless keyboard segment. The package includes a USB-A dongle, a USB-C cable, and a silicone cover. Warranty is standard one year.

Best Use Cases

Mobile workers and frequent travelers: The ultra-slim body (approx. 200g) and 1,200-hour battery life make it ideal for slipping into a laptop bag without worrying about charging. Office users who need quiet typing: Scissor switches produce less noise than mechanical ones, making them suitable for open-plan offices or meeting rooms. * Multi-device users: Up to three paired devices can be switched with a single key press, covering PC, tablet, and phone setups.

Things to Consider

This is not a mechanical keyboard, so the typing feel is shallower. Heavy typists may prefer a mechanical board. ZMK customization requires a web-based editor rather than dedicated software. The keyboard runs on a single AA battery only—no rechargeable battery option. ## Alternatives
Direct competitors include the Logitech K380 (Bluetooth-only, around ¥3,000) and Anker’s ultra-slim wireless keyboard (around ¥4,000). The K380 lacks 2.4GHz support and JIS layout options. The Keychron B1 Pro offers both 2.4GHz and Bluetooth with a JIS kana-printed layout, making it a more practical choice for Japanese users.

Product Disclosure (Amazon)

  • Manufacturer: Keychron
  • Seller: Keychron Japan
  • Fulfilled by: Amazon
  • ASIN: B0FDQZ6BL8
  • Note: This article covers a manufacturer-made product based on Amazon listing details.