Summary

Portrait of William O. Douglas William O. Douglas Kawakita v. United States — Opinion of the Court

If he can retain that freedom and still remain an American citizen, there is not even a minimum of allegiance which he owes to the United States while he resides in the enemy country. That conclusion is hostile to the concept of citizenship as we know it, and it must be rejected. One who wants that freedom can get it by renouncing his American citizenship.
Source: Wikisource

Portrait of William O. Douglas William O. Douglas Kawakita v. United States — Opinion of the Court

The act may be unnecessary to a successful completion of the enemy's project; it may be an abortive attempt; it may in the sum total of the enemy's effort be a casual and unimportant step. But if it gives aid and comfort to the enemy at the immediate moment of its performance, it qualifies as an overt act within the constitutional standard of treason.
Source: Wikisource

Portrait of William O. Douglas William O. Douglas Kawakita v. United States — Opinion of the Court

The mere fact that he asserts the rights of one citizenship does not without more mean that he renounces the other. In this setting petitioner's registration in the Koseki might reasonably be taken to mean no more than an assertion of some of the rights which his dual citizenship bestowed on him. The deposition of the Attorney General of Japan states that the entry of a person's name in the Koseki is taken to mean that one has Japanese nationality. But since petitioner already had Japanese nationality, he obviously did not acquire it by the act of registration.
Source: Wikisource

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