Fukashima is not uninhabitable, neither is Chernobyl/Pripyat, you won't just die from entering the area without any protection.

Very few health issues have been detected as a cause of the Fukashima nuclear disaster:

https://www.world-nuclear.org/information-library/safety-and-security/safety-of-plants/appendices/fukushima-radiation-exposure.aspx

It is the fear of radiation that makes us call it uninhabitable, this is an older documentary, but it is still valid and is still important:

https://www.dailymotion.com/video/x7pqwo8