U.S. citizens should arrange for immediate return to the United States, unless they are prepared to remain abroad for an indefinite period

Health Alert – U.S. Embassy Tokyo (April 3, 2020)
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If U.S. citizens wish to return to the United States, they should make arrangements to do so now. U.S. citizens who live in the United States but are currently in Japan should arrange for an immediate return to the United States, unless they are prepared to remain abroad for an indefinite period.

これもめちゃ難しい選択だろうね。