  This paper presents the results of radiation dose rate measurements taken by
the author in various locations in South Korea and Japan, including near the
Fukushima Daiichi nuclear power plant site. Air dose rates were measured in
Seoul, during a flight over the East Sea, in Fukushima Prefecture, and in Tokyo
using a calibrated survey instrument. The measurements were compared with
reference values from official sources or previous studies. The author
discovered that the majority of the measurements fell within the normal range
of environmental radiation, except for an unusually high dose rate at Tomioka
Station, which is approximately 10 km away from the Fukushima Daiichi nuclear
plant. The author recommends that Japanese institutions conduct more precise
measurements in the vicinity of the nuclear accident sites.
