At about 44th minute, while consulting the I-Ching book, Tagomi-san incorrectly builds the hexagram from the top down: the right way to build a hexagram in order to get the oracle is from the bottom up.
Tagomi instructs Juliana to assist a visiting general in surveying the locations Uranium deposits in the neutral zone. Although the north-western United States does contain deposits of Urainium ore, there are far richer deposits in the Kakadu region of Northern Australia, which is presumably also under Japanese control. It would make more sense for the Japanese to start their search there.