Sadly they did. The ship could easily have been carrying rubber back to Japan.
Japanese war planners had long looked south, especially to Brunei for oil and Malaya for rubber and tin. In the autumn of 1940, Japan requested 3.15 million barrels of oil from the Dutch East Indies but received a counteroffer of only 1.35 million.[19] The complete U.S. oil embargo reduced the Japanese options to two: seize Southeast Asia before its existing stocks of strategic materials were depleted or submission to American demands.[20] Moreover, any southern operation would be vulnerable to attack from the Philippines, a U.S. colony, and so war against the U.S. seemed necessary in any case.
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