Exactly! It's not straight forward from the Japanese gov't. But data shows it. Take a look at this article I found, as I didn't feel Steve's source was sound enough.
Here's much better although still not perfect info I found from my searching:
https://cannabiscancersite.wordpress.com/2021/12/23/the-truth-about-japan-and-ivermectin/ @SteveKirsch look at this, better than your source