About 500 km
The distance is either 548 kilometers or 340 miles from Fukushima to Kobe
There are about 526.393 miles between Tokyo, Japan and Hokkaido, Japan.
250-300km
From Tokyo to Hokkaido is a 1268 Km journey taking just over 17 hours
240 km
1,893 miles
965 kilometres (travel/road distance is approx. 1110km).
Fukushima
The distance from Fukushima, Japan, to Taipei, Taiwan, is approximately 2,100 kilometers (about 1,300 miles) when measured in a straight line (great circle distance). However, actual travel distance may vary depending on the specific route taken by air or sea.
1887miles or 3036.18 KM
The distance from Okinawa to Fukushima is 1081 miles or 1739.7 km.
You are probably referring to the Fukushima Daiichi Nuclear Power Plant. It is on the seashore, and separated from the ocean only by a seawall, which was nearly 9 meters (28 feet) to low to stop the tsunami.