Whether imposing a wartime curfew on citizens of Japanese ancestry, but not other citizens, violated the Fifth Amendment.
Holding
No. The Court held that the curfew, as applied in the circumstances of 1942, did not violate Fifth Amendment due process.
Reasoning
The Court called ancestry-based distinctions odious and recognized that severe discrimination can violate Fifth Amendment due process. It nevertheless asked whether the wartime circumstances gave Congress and the military a reasonable basis for this particular restriction.
The Court emphasized the perceived threat of invasion, espionage, and sabotage on the Pacific Coast, where important military facilities were located. It accepted the judgment that potentially disloyal people within the Japanese American population could not quickly be identified and addressed individually.
On that view, the Court found a rational basis for treating people of Japanese ancestry differently during the emergency. It considered a nighttime curfew a protective measure against sabotage and declined to substitute its judgment for that of the branches responsible for conducting the war. The holding concerned the curfew at the time it was imposed, not the separate exclusion order.