5 December 1941
Cir #625—(Circular Number) To be handled in government code.
Re my secret military communication #262* of November 30th.
1. Concurrent with opening war on Britain and America we have considered Holland as a semi-belligerent and have exercised strict surveillance over her consulates and prohibited all communication between them and the enemy countries.
2. Coincident with the beginning of the war against Britain and America we have taken steps to prohibit the use of code messages and the use of wireless by the Holland consulates.
3. In case war breaks out with Holland we will take the same steps toward that country that we have taken in the case of Britain and America.
JD-1: 7335 (H) Navy Trans. 12-11-41 (AR)
(EXHIBITS OF JOINT COMMITTEE , EXHIBIT NO. 1 INTERCEPTED DIPLOMATIC MESSAGES SENT BY THE JAPANESE GOVERNMENT BETWEEN JULY l AND DECEMBER 8, 1941)