So I had a google search for owl cafes in Japan - and most of them are in Tokyo (as you might expect). I looked at the websites for 3 of them and found Cafe MohuMohu.
Passing this website through google translate (translated) gave me an indication that the big green button on the front page was for their owl "Friends" page. Clicking on this (in the ...
Having had a listen to the recording of boreal owls here.
I had a google for calls that are similar to owls and came across the Wilson's snipe, which doesn't make a call like the owl, but rather uses air rushing through its feathers to make the sound. They are very common all across North America (the continent) and central America.