This isnt for our mirage. It is however for a mirage.

https://blackforestindustries.com/co...r-mini-fitment

Anyone have an idea of how to make this fit on a normal Japanese threaded shifter?

I see adaptors to make euro style shift knobs into threaded ones however, I don't see the other way around.

Only thing I can think to do is take it and then thread the inside of it.