that Finnish and Hungarian are distantly related to Japanese and Korean

I had always known that Finnish and Hungarian are related languages.  They are called Uralic (as in Ural Mountains) languages, as is Estonian and a couple of others.  They are not in the Indo-European family as most European languages are.  There is a theory that Uralic languages are distantly related to Altaic languages, which include Japanese and Korean. The evidence is commonality in pronouns and in some key words. But, this is highly controversial and by  no means readily accepted in linguistic analysis. Still, fascinating.