why do you say that?

I didn't see it in the article nor the 2025 study https://www.nature.com/articles/s41893-025-01578-w

Additionally, the article points to Spain and Lake Constance in the Alps exhibiting similar effects.

I looked at few documents about japan and I believe it was conclusive.

https://www.nippon.com/en/articles/-/14855

I will look up spain when I get time and get back to you. I have to be somewhere now.