⚡ Operating Systems in Japan

Server operating systems are designed for computers that provide network services, such as hosting websites or storing data.

Japan is an East Asian country with a population of around 125 million people.

According to our research, operating systems are detected on 9.1% of websites from Japan.

Statistics based on 187K+ analyzed websites. About this data

⭐ Most Popular in 2026

The following chart shows the top operating systems on websites in Japan in 2026, based on market share.

The most popular is Linux, which dominates the market with an overwhelming 79.6% share.
It is followed by CentOS with 18.6% and Windows with 10.3%.

Linux 79.6%
CentOS 18.6%
Windows 10.3%
Unix 8.9%
Ubuntu 6.9%
AlmaLinux 3.3%
Amazon Linux 2.9%
Rocky Linux 2.7%
Debian 1.9%
Red Hat Enterprise Linux 1.9%
FreeBSD 1.3%
Oracle Linux 0.1%
TurboLinux 0.1%
Scientific Linux 0.06%
Fedora 0.05%

🚀 Highlights

Here is a list of the top systems that are more popular in Japan than worldwide.
Differences between global and country rankings are shown in parentheses.

2. CentOS ^(-3)
4. Unix ^(-2)
6. AlmaLinux ^(-1)
7. Amazon Linux ^(-4)
8. Rocky Linux ^(-1)
12. Oracle Linux ^(-1)
13. TurboLinux ^(-7)
14. Scientific Linux ^(-5)
16. OpenBSD ^(-1)
19. Mageia ^(-2)

✨ Best Operating Systems

Below is a more detailed list of 19 operating systems used on sites from Japan, ranked by their market share.

Rank	Name	Market share
1	Linux San Francisco, California, United States A family of open-source, Unix-like operating systems based on the Linux kernel, originally created by Linus Torvalds and now maintained by a global community of contributors. FreeOpen source	79.6%
2	CentOS Raleigh, North Carolina, United States A discontinued open-source Linux distribution compatible with RHEL. Legacy	18.6%
3	Windows Redmond, Washington, United States A family of proprietary operating systems from Microsoft used on personal computers, servers, and virtualized environments. $1,176+	10.3%
4	Unix San Francisco, California, United States A family of multitasking, multi-user operating systems originally developed at Bell Labs that became one of the foundations of modern server, networking, and enterprise computing. FreeOpen source	8.9%
5	Ubuntu London, United Kingdom A free operating system based on Debian GNU/Linux, designed for desktops, servers, cloud, and IoT environments. FreeOpen source$500+/year	6.9%
6	AlmaLinux Estero, Florida, United States An open-source enterprise Linux distribution focused on long-term stability and binary compatibility with Red Hat Enterprise Linux. FreeOpen source	3.3%
7	Amazon Linux Seattle, Washington, United States A supported and maintained Linux image provided by Amazon Web Services for use on Amazon Elastic Compute Cloud. Free	2.9%
8	Rocky Linux Albany, California, United States An open-source enterprise operating system designed to be 100% bug-for-bug compatible with Red Hat Enterprise Linux. FreeOpen source	2.7%
9	Debian New York, United States A free and open-source Linux distribution that provides a stable operating system with a strong focus on reliability, security, and universal compatibility across multiple hardware architectures. FreeOpen source	1.9%
10	Red Hat Enterprise Linux Raleigh, North Carolina, United States A commercial enterprise Linux distribution designed for hybrid cloud deployments across physical, virtual, and cloud environments. $383.90+	1.9%
11	FreeBSD Boulder, Colorado, United States An open-source Unix-like operating system designed for reliability, performance, and advanced networking across servers, desktops, and embedded systems. FreeOpen source	1.3%
12	Oracle Linux Austin, Texas, United States A Linux distribution based on RHEL source code, freely distributed by Oracle.	0.1%
13	TurboLinux A discontinued Japanese Linux distribution. Legacy	0.1%
14	Scientific Linux A discontinued Linux distribution based on RHEL. Legacy	0.06%
15	Fedora Raleigh, North Carolina, United States An open-source operating system developed by the Fedora Project that serves as the upstream community distribution for Red Hat Enterprise Linux. FreeOpen source	0.05%
16	OpenBSD Edmonton, Alberta, Canada A security-focused open-source operating system based on the Berkeley Software Distribution.	0.03%
17	Gentoo Albuquerque, New Mexico, United States A Linux distribution built using the Portage package management system.	0.006%
18	Raspbian A free operating system based on Debian optimized for the Raspberry Pi hardware. FreeOpen source	0.006%
19	Mageia An open-source operating system forked from Mandriva Linux.	0.006%

👉 See Also

🌎 Operating Systems in other countries

🗃️ About This Data

We evaluate the popularity of technologies based on the number of websites where we detect their usage.
Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
This report is based on the analysis of 187,775 websites from Japan.
We currently track the presence of 22 operating systems across the web.
Of these, 19 were detected on websites from Japan.
Statistics were last calculated on August 30, 2026.
For more details, see our methodology and disclaimer.