A Japanese supermarket chain, Maruetsu measured cesium from pistachio imported from US. [Link]
(cf. Japan exports Fukushima peach and has Imperial family consume it)
98% of American pistachio is produced in California. [Link]
The measurement was on 8/11/2012, it was 9.54 Bq/Kg. (Cs-137)
Also, 5.59 Bq/Kg of Cs-137 was measured from Japanese trout. It was from Shiga in western Japan.(540km from Fukushima plant)
6.62 Bq/Kg of Cs-137 was measured from beef in Shimane. Shimane is in western Japan as well. (750 km from Fukushima plant)
This is as much as beef in Chiba (6.43 Bq/Kg, Cs-137), where is in eastern Japan. Chiba is only 220km from Fukushima plant, is known to be a hotspot.
Iori Mochizuki