Americium was detected also, but the Ministry of Education and Science thinks it is a background number.
Now the Japanese government has admitted to tellurium, plutonium, uranium, strontium, curium in the soil outside the plant. It is yet to admit how far and wide. Maybe in another month or two.
The soil samples were taken on April 29 and May 1.
The image of the press release by the Ministry on June 13 (I put americium, curium in a red bracket):
According to the map attached to the above sheet, the two locations where curium was detected lie on the straight line from the plant, west by southwest.