Windows 11 professional 1PC 日本語認証保証ウィンドウズ win11 OS ダウンロード版プロダクトキーライセンス認証永久

Microsoft Windows 11 Pro — 1 PC, Japanese Version (Download Edition)

On sale Microsoft

Windows 11 Pro for one PC, activated with a key

Prices include tax / download editions are available as soon as payment is complete

Release date: 2026/01/05

A Japanese-version Windows 11 Pro product key for a single PC, delivered by email so you can install and activate immediately.

Genuine manufacturer license
Free shipping on orders over ¥3,980
Unopened items can be returned within 30 days
ダウンロード版（プロダクトキーをメールでお送りします）

Manufacturer	Microsoft
Supported OS	Windows 11 / 10
License	1 device(s)

This listing supplies a Japanese-version Windows 11 Pro product key for one PC, delivered by email after your order is confirmed.

Windows 11 Pro is the business edition of Microsoft’s current operating system, aimed at users who need more than the Home edition provides. It brings enhanced security features, improved productivity tools and support for modern hardware. Practical additions include Remote Desktop for reaching the machine from another location and Hyper-V virtualisation for running multiple operating systems. Disk encryption, Windows Information Protection and Windows Defender Antivirus work alongside Secure Boot and Trusted Boot to protect both data and the startup process.

Key details

Edition: Windows 11 Pro, Japanese version
Licence: 1 PC, perpetual use
Delivery: download edition, product key by email

Suits businesses, freelancers and power users who want the Pro feature set on a single machine.

Manufacturer	Microsoft
Release date	2026/01/05
Supported OS	Windows 11 / 10
License	1 device(s)
Delivery method	Download edition (product key sent by email)

Support after purchase

Products you purchase can be re-downloaded at any time from My Account. Contact our Japanese-language support desk for help with installation or settings.