Notice Regarding the End of Support for Windows 10

We sincerely thank you for your continual support of our company's products.
The following is a notice regarding the system requirements for our PC game software (Windows version).

On October 14th, 2025 (JST), Microsoft will be ending support for the Windows 10 operating system.
Accordingly, our company will also be ending support for Windows 10 on Tuesday, October 14th, 2025.

Should you continue to use Windows 10, you will still be able to play our games for some time after support has ended.
However, there may be cases where games will not run properly due to the application of future updates or automatic updates.
(Automatic updates refers to online games, etc., in which the program is automatically updated when the server is accessed.)

We would like to ask all affected customers to please take note of the support termination date and consider OS migration as soon as possible.

For information regarding the end of support for Windows 10, please refer to Microsoft's website.

If any other guidance becomes necessary, we will provide such guidance as soon as possible.
Thank you once again for your continued support and understanding.

Об этой игре

To commemorate Kou Shibusawa's 35th anniversary, the "Kou Shibusawa Archives" will be opened in the Steam Store. Here we will revive popular previously released titles.

In this ninth round of releases, we offer "Romance of the Three Kingdoms Ⅸ with Power Up Kit," an expanded version of the 9th game in the series.

RTK Ⅸ is a strategy based simulation game based in China's chaotic Three Kingdoms period. Players portray a Daimyo and lead their clan in an attempt to unify the entire land of Japan. For the first time in the series, the game uses a single large map and brings together battle and strategy in an entirely new way. Players give their officers "Strategies" and those officers work to carry them out in real-time. Players can also set up facilities and obstacles on the battlefield to aid them. Officers can learn tactics and employ them in a strategic battle like none before.