Regarding the future of the Japanese technology tree

Currently, whether in the Air Force or the Ground Force, Japan’s tech tree has already reached the cutting edge in reality. So, perhaps it’s time to consider adding some nations (such as Thailand) as sub-tech trees to the Japanese tech tree. Here, I’d like to hear which countries everyone would like to see included.

Regarding Thailand, There have been threads already discussing this.

Some are;

Korea one;

If you want to discuss something please use machinery of war and title your post to the tech tree idea you’d like to discuss assuming one hasn’t been made, Cheers.