About the Ultra-fast WordPress Virtual Machine KUSANAGI



Developed by Prime Strategy, KUSANAGI is an ultra-fast, open source virtual machine that allows CMS to run at world class speeds.

High Performance

It brings WordPress execution time to under four milliseconds, and enables 1,000 requests/second, even without page caching.

With page caching, this increases to over 60,000 requests/second (both cases 4vCPU maximum performance).

Improved response time with KUSANAGI
Improved response time with KUSANAGI

Standard environment KUSANAGI
Admin dashboard(without caching) 1 10~15 times faster
Normal pages(with caching) 1 Several thousand times faster

Platforms on which KUSANAGI can be used

KUSANAGI Usage Map (Mar, 2020)
KUSANAGI Usage Map (Mar, 2020)

As of July 2019, KUSANAGI is available in 26 countries and 198 regions, on 28 major platforms internationally, and has had a cumulative 40,000 deployments thus far.

>Please check the available cloud platforms.

KUSANAGI framework

・WordPress latest version (KUSANAGI dedicated plug-ins included)
・CentOS 7.x
・Nginx 1.21.x
・Apache 2.4
・PHP 7.4.x
・PHP 5.6.x
・HHVM 3.19.2
・MariaDB 10.3.*
・Ruby on Rails
* PHP7 requires WordPress 4.4 or higher and compatible plugins.

Performance trial results

In the performance trial results produced by Prime Strategy Co., Ltd., the following processing capability was achieved.(*1)

ab -n 10000 -c 300 https://en.kusanagi.tokyo/

Server Software: nginx
Server Hostname: kusanagi.tokyo
Server Port: 80
Document Path: /
Document Length: 6952 bytes
Concurrency Level: 300
Time taken for tests: 9.643 seconds
Complete requests: 10000
Failed requests: 0
Write errors: 0
Total transferred: 71680000 bytes
HTML transferred: 69520000 bytes
Requests per second: 1036.97 [#/sec] (mean)
Time per request: 289.305 [ms] (mean)
Time per request: 0.964 [ms] (mean, across all concurrent requests)(*2)
Transfer rate: 7258.78 [Kbytes/sec] received

*1 At maximum performance. Processing speed will vary depending on instance size and website content (such as features and amount of data).
*2 Simulation conducted using a quad-core (4vCPU) virtual machine; therefore, WordPress run time was 3.856 milliseconds (0.964 milliseconds multiplied by 4).


There are three different edition of KUSANAGI to choose from, depending on your web site/system scale:

  • Free Edition
  • Business Edition
  • Premium Edition

For more information, please consult “Editions and Updates.”

Speed-Tuning Engine

Using the speed-tuning Engine “WEXAL® Page Speed Technology” on KUSANAGI Premium Edition will boost web sites’ loading speed.

About Prime Strategy Group


Prime Strategy Group is a cloud integrator solving the issues of cloud computing for global companies, beginning with Asia. With presences in Japan, Singapore, and Indonesia, we offer cloud integration services, mainly in the form of SI and MSP on cloud platforms.

On the business front, we architect web systems for government bodies as well as corporations that represent both domestic and foreign industries. These include the Japan Aerospace Exploration Agency (JAXA), the University of Tokyo, TV Asahi, Mynavi, Adobe Systems, JTB Asia Pacific, and Bank Negara Indonesia. We have also constructed many large-scale WordPress sites in Japan