No real info, but I had the U-Control Zeke kit from Japan. Got it when I was a kid because "it was a big plane" and the least expensive. It had a lot of interesting features. The plans were in Japanese, but it came with an onionskin sheet of "translations."  I still remember being instructed "...to mix the powdered bones."

The wheels were solid hard rubber. The fuel tank (supplied) was a clear plastic like you might find on takeout food. The "rising suns" we printed red paper. The balsa was amazingly light, which I did not appreciate at the time since it made planking the fuselage so much more difficult. As I recall, some or all of the bulkheads were 3-ply luan? I think the wing spar was as well, at least out to the landing gear. The real attraction was a spun aluminum cowling. Spiffy!

I still have the plane. It never did really fly very successfully. A Torp.09 Greenhead was never going to be up to the job no matter what the box might have said.

Good luck with your kits,

Dave

Some enterprising soldier there on occupation duty took the opportunity to go in business with a Japanese company..  I served with a CPO  that did that with a Japanese motorcycle company.. He got a special dealership with them...
Look under the word "Spitfire"  under the photo, and you can see the Chinese writing used by the Japanese. I know that sounds strange  but that's  what they call it.

Occupation ended right after the Korean war, so those kits are more than likely  from the mid  50's to early 60's.