Actually, uhm on most old photo's from indonesia nobody wears a gi. Just a t-shirt and loose pants and chinese shoes most of the time.
My master was there in i think 1963. That's what it says on the photo. Each photo has a year written on the back.
And well my master uses a mixture of just plain Dutch, Chinese and Indonesian terms.
For instance he does not use the word Kata but Jurus. You can find Jurus in Kun-Tao. According to my sources it is a Indonesian word. Kun-Tao was the kung fu version for the Indonesians and foreigners.
But most of the time it is: Hit the throat, kick the groin. Break the arm.
Instead of "mantis catches fly" or "monkey scratches his arse"
(joking!)
Ah well. The school was there long before 65'.
So it would explain the usage of japanese and indonesian terms way before that.
Why they declared it legal again? The dutch left indonesia i believe somewhere short after WWII. Indonesia then was run by Indonesians and they did not think highly of foreigners(can't blaim 'm, even now Dutch soldiers are blamed for raping and killing, we had no clean hands in it.)But in the end, a government has to loosen up for economic and trading. And let's face it. Chinese are the best traders in the world. They're everywhere and thriving!