Iwate is still the only one of Japan's 47 prefectures with no confirmed coronavirus cases. Any theories why?

Yeah, because they didn't test enough, and were not able to identify who had the virus. With the number of cases that were in Tokyo, Kanagawa etc. you can't tell me one of these people didn't travel to Morioka and infect people. But if you don't test, then you can still claim to have zero cases!

agree with the previous post... key words there being “ no confirmed cases “... not confirmed... doesn,t mean there aren,t / weren,t any cases... testing / not testing makes a big difference...

Because they haven't done any/sufficient testing there.

According to Aso, it’s their culture.

Wanko soba no doubt.

Not enough testing

Those of us who live in Iwate care.

Japan has had a very low number of cases in total so there are a number of prefectures who were barely touched. It's the big cities that we were rightly worried about.