Fukushima is a realm in the Filthy Frank Universe.
Not much information is known about Fukushima, but is home and the birthplace of Hazmat Beast. It is named after the city Fukushima in Japan. Since Hazmat Beast was born on March 11, 2011, and the Fukushima Nuclear Power Plant accident on March 11, 2011, suggesting that this realm is most likely highly radioactive and the accident lead to the birth of many creatures such as Hazmat Beast and the death of his parents, originating from New Zealand. However, the entirety of this realm, along with Realm 0, are part of Japan.
It is also believed that this is where Lemon was born, as it is theorized that he was from lemon origin but then he became a mutant since the disaster happened.