[W]e are unable to conclude that it was beyond the war power of Congress and the Executive to exclude those of Japanese ancestry from the West Coast war area at the time they did. True, exclusion from the area in which one's home is located is a far greater deprivation than constant confinement to the home from 8 p.m. to 6 a.m. Nothing short of apprehension by the proper military authorities of the gravest imminent danger to the public safety can constitutionally justify either. But exclusion from a threatened area, no less than curfew, has a definite and close relationship to the prevention of espionage and sabotage. The military authorities, charged with the primary responsibility of defending our shores, concluded that curfew provided inadequate protection and ordered exclusion. They did so . . . in accordance with Congressional authority to the military to say who should, and who should not, remain in the threatened areas. . . .

[E]xclusion of those of Japanese origin was deemed necessary because of the presence of an unascertained number of disloyal members of the group, most of whom we have no doubt were loyal to this country. . . . The judgment that exclusion of the whole group was for the same reason a military imperative answers the contention that the exclusion was in the nature of group punishment based on antagonism to those of Japanese origin. That there were members of the group who retained loyalties to Japan has been confirmed by investigations made subsequent to the exclusion. Approximately five thousand American citizens of Japanese ancestry refused to swear unqualified allegiance to the United States and to renounce allegiance to the Japanese Emperor, and several thousand evacuees requested repatriation to Japan.

We uphold the exclusion order as of the time it was made and when the petitioner violated it. . . . In doing so, we are not unmindful of the hardships imposed by it upon a large group of American citizens. . . . But hardships are part of war, and war is an aggregation of hardships. All citizens alike, both in and out of uniform, feel the impact of war in greater or lesser measure. Citizenship has its responsibilities as well as its privileges, and in time of war the burden is always heavier. Compulsory exclusion of large groups of citizens from their homes, except under circumstances of direst emergency and peril, is inconsistent with our basic governmental institutions. But when under conditions of modern warfare our shores are threatened by hostile forces, the power to protect must be commensurate with the threatened danger. . . .

It is said that we are dealing here with the case of imprisonment of a citizen in a concentration camp solely because of his ancestry, without evidence or inquiry concerning his loyalty and good disposition towards the United States. Our task would be simple, our duty clear, were this a case involving the imprisonment of a loyal citizen in a concentration camp because of racial prejudice. Regardless of the true nature of the assembly and relocation centers - and we deem it unjustifiable to call them concentration camps with all the ugly connotations that term implies - we are dealing specifically: with nothing but an exclusion order. To cast this case into outlines of racial prejudice, without reference to the real military dangers which were presented, merely confuses the issue. Korematsu was not excluded from the Military Area because of hostility to him or his race. He was excluded because we are at war with the Japanese Empire, because the properly constituted military authorities feared an invasion of our West Coast and felt constrained to take proper security measures, because they decided that the military urgency of the situation demanded that all citizens of Japanese ancestry be segregated from the West Coast temporarily and finally, because Congress, reposing its confidence in this time of war in our military leaders - as inevitably it must - determined that they should have the power to do just this. There was evidence of disloyalty on the part of some, the military authorities considered that the need for action was great and time was short. We cannot - by availing ourselves of the calm perspective of hindsight - now say that at that time these actions were unjustified.

JUSTICE ROBERTS’ DISSENT: This is not a case of keeping people off the streets at night as was Hirabayashi v. United States, 320 U.S. 81, nor a case of temporary exclusion of a citizen from an area for his own safety or that of the community, nor a case of offering him an opportunity to go temporarily out of an area where his presence might cause danger to himself or to his fellows. On the contrary, it is the case of convicting a citizen as a punishment for not submitting to imprisonment in a concentration camp, based on his ancestry, and solely because of his ancestry, without evidence or inquiry concerning his loyalty and good disposition towards the United States. If this be a correct statement of the facts disclosed by this record, and facts of which we take judicial notice, I need hardly labor the conclusion that Constitutional rights have been violated.

The petitioner, a resident of San Leandro, Alameda County, California, is a native of the United States of Japanese ancestry who, according to the uncontradicted evidence, is a loyal citizen of the nation. . . .

The predicament in which the petitioner . . . found himself was this: He was forbidden, by Military Order, to leave the zone in which he lived; he was forbidden, by Military Order, after a date fixed, to be found within that zone unless he were in an Assembly Center located in that zone. General DeWitt's report to the Secretary of War concerning the programme of evacuation and relocation of Japanese makes it entirely clear . . . that an Assembly Center was a euphemism for a prison. No person within such a center was permitted to leave except by Military Order.

In the dilemma that he dare not remain in his home, or voluntarily leave the area, without incurring criminal penalties, and that the only way he could avoid punishment was to go to an Assembly Center and submit himself to military imprisonment, the petitioner did nothing. . . .

I had supposed that if a citizen was constrained by two laws, or two orders having the force of law, and obedience to one would violate the other, to punish him for violation of either would deny him due process of law. And I had supposed that under these circumstances a conviction for violating one of the orders could not stand. . . .

JUSTICE MURPHY’S DISSENT: This exclusion of "all persons of Japanese ancestry, both alien and non-alien," from the Pacific Coast area on a plea of military necessity in the absence of martial law ought not to be approved. Such exclusion goes over "the very brink of constitutional power" and falls into the ugly abyss of racism.

In dealing with matters relating to the prosecution and progress of a war, we must accord great respect and consideration to the judgments of the military authorities who are on the scene and who have full knowledge of the military facts. The scope of their discretion must, as a matter of necessity and common sense, be wide. And their judgments ought not to be overruled lightly by those whose training and duties ill-equip them to deal intelligently with matters so vital to the physical security of the nation.

At the same time, however, it is essential that there be definite limits to military discretion, especially where martial law has not been declared. Individuals must not be left impoverished of their constitutional rights on a plea of military necessity that has neither substance nor support. Thus, like other claims conflicting with the asserted constitutional rights of the individual, the military claim must subject itself to the judicial process of having its reasonableness determined and its conflicts with other interests reconciled. . . .

The judicial test of whether the Government, on a plea of military necessity, can validly deprive an individual of any of his constitutional rights is whether the deprivation is reasonably related to a public danger that is so "immediate, imminent, and impending" as not to admit of delay and not to permit the intervention of ordinary constitutional processes to alleviate the danger. . . . Civilian Exclusion Order No. 34, banishing from a prescribed area of the Pacific Coast "all persons of Japanese ancestry, both alien and non-alien," clearly does not meet that test. Being an obvious racial discrimination, the order deprives all those within its scope of the equal protection of the laws as guaranteed by the Fifth Amendment. It further deprives these individuals of their constitutional rights to live and work where they will, to establish a home where they choose and to move about freely. In excommunicating them without benefit of hearings, this order also deprives them of all their constitutional rights to procedural due process. Yet no reasonable relation to an "immediate, imminent, and impending" public danger is evident to support this racial restriction which is one of the most sweeping and complete deprivations of constitutional rights in the history of this nation in the absence of martial law.

It must be conceded that the military and naval situation in the spring of 1942 was such as to generate a very real fear of invasion of the Pacific Coast, accompanied by fears of sabotage and espionage in that area. The military command was therefore justified in adopting all reasonable means necessary to combat these dangers. In adjudging the military action taken in light of the then apparent dangers, we must not erect too high or too meticulous standards; it is necessary only that the action have some reasonable relation to the removal of the dangers of invasion, sabotage and espionage. But the exclusion, either temporarily or permanently, of all persons with Japanese blood in their veins has no such reasonable relation. And that relation is lacking because the exclusion order necessarily must rely for its reasonableness upon the assumption that all persons of Japanese ancestry may have a dangerous tendency to commit sabotage and espionage and to aid our Japanese enemy in other ways. It is difficult to believe that reason, logic or experience could be marshalled in support of such an assumption. . . .

The main reasons relied upon by those responsible for the forced evacuation, therefore, do not prove a reasonable relation between the group characteristics of Japanese Americans and the dangers of invasion, sabotage and espionage. The reasons appear, instead, to be largely an accumulation of much of the misinformation, half-truths and insinuations that for years have been directed against Japanese Americans by people with racial and economic prejudices -- the same people who have been among the foremost advocates of the evacuation. A military judgment based upon such racial and sociological considerations is not entitled to the great weight ordinarily given the judgments based upon strictly military considerations. Especially is this so when every charge relative to race, religion, culture, geographical location, and legal and economic status has been substantially discredited by independent studies made by experts in these matters. . . .

No one denies, of course, that there were some disloyal persons of Japanese descent on the Pacific Coast who did all in their power to aid their ancestral land. Similar disloyal activities have been engaged in by many persons of German, Italian and even more pioneer stock in our country. But to infer that examples of individual disloyalty prove group disloyalty and justify discriminatory action against the entire group is to deny that under our system of law individual guilt is the sole basis for deprivation of rights. Moreover, this inference, which is at the very heart of the evacuation orders, has been used in support of the abhorrent and despicable treatment of minority groups by the dictatorial tyrannies which this nation is now pledged to destroy. To give constitutional sanction to that inference in this case, however well-intentioned may have been the military command on the Pacific Coast, is to adopt one of the cruelest of the rationales used by our enemies to destroy the dignity of the individual and to encourage and open the door to discriminatory actions against other minority groups in the passions of tomorrow.

I dissent, therefore, from this legalization of racism. Racial discrimination in any form and in any degree has no justifiable part whatever in our democratic way of life. It is unattractive in any setting but it is utterly revolting among a free people who have embraced the principles set forth in the Constitution of the United States. All residents of this nation are kin in some way by blood or culture to a foreign land. Yet they are primarily and necessarily a part of the new and distinct civilization of the United States. They must accordingly be treated at all times as the heirs of the American experiment and as entitled to all the rights and freedoms guaranteed by the Constitution.

JUSTICE JACKSON’S DISSENT: Korematsu was born on our soil, of parents born in Japan. The Constitution makes him a citizen of the United States by nativity and a citizen of California by residence. No claim is made that he is not loyal to this country. There is no suggestion that apart from the matter involved here he is not law-abiding and well disposed. Korematsu, however, has been convicted of an act not commonly a crime. It consists merely of being present in the state whereof he is a citizen, near the place where he was born, and where all his life he has lived. . . .

A citizen's presence in the locality, however, was made a crime only if his parents were of Japanese birth. Had Korematsu been one of four -- the others being, say, a German alien enemy, an Italian alien enemy, and a citizen of American-born ancestors, convicted of treason but out on parole -- only Korematsu's presence would have violated the order. The difference between their innocence and his crime would result, not from anything he did, said, or thought, different than they, but only in that he was born of different racial stock.

Now, if any fundamental assumption underlies our system, it is that guilt is personal and not inheritable. Even if all of one's antecedents had been convicted of treason, the Constitution forbids its penalties to be visited upon him, for it provides that "no attainder of treason shall work corruption of blood, or forfeiture except during the life of the person attainted." But here is an attempt to make an otherwise innocent act a crime merely because this prisoner is the son of parents as to whom he had no choice, and belongs to a race from which there is no way to resign. If Congress in peace-time legislation should enact such a criminal law, I should suppose this Court would refuse to enforce it. . . .

It would be impracticable and dangerous idealism to expect or insist that each specific military command in an area of probable operations will conform to conventional tests of constitutionality. When an area is so beset that it must be put under military control at all, the paramount consideration is that its measures be successful, rather than legal. The armed services must protect a society, not merely its Constitution. The very essence of the military job is to marshal physical force, to remove every obstacle to its effectiveness, to give it every strategic advantage. Defense measures will not, and often should not, be held within the limits that bind civil authority in peace. No court can require such a commander in such circumstances to act as a reasonable man; he may be unreasonably cautious and exacting. Perhaps he should be. But a commander in temporarily focusing the life of a community on defense is carrying out a military program; he is not making law in the sense the courts know the term. He issues orders, and they may have a certain authority as military commands, although they may be very bad as constitutional law.

But if we cannot confine military expedients by the Constitution, neither would I distort the Constitution to approve all that the military may deem expedient. That is what the Court appears to be doing, whether consciously or not. I cannot say, from any evidence before me, that the orders of General DeWitt were not reasonably expedient military precautions, nor could I say that they were. But even if they were permissible military procedures, I deny that it follows that they are constitutional. If, as the Court holds, it does follow, then we may as well say that any military order will be constitutional and have done with it. . . .

In the very nature of things, military decisions are not susceptible of intelligent judicial appraisal. They do not pretend to rest on evidence, but are made on information that often would not be admissible and on assumptions that could not be proved. Information in support of an order could not be disclosed to courts without danger that it would reach the enemy. Neither can courts act on communications made in confidence. Hence courts can never have any real alternative to accepting the mere declaration of the authority that issued the order that it was reasonably necessary from a military viewpoint. . . .

But a judicial construction of the due process clause that will sustain this order is a far more subtle blow to liberty than the promulgation of the order itself. A military order, however unconstitutional, is not apt to last longer than the military emergency. Even during that period a succeeding commander may revoke it all. But once a judicial opinion rationalizes such an order to show that it conforms to the Constitution, or rather rationalizes the Constitution to show that the Constitution sanctions such an order, the Court for all time has validated the principle of racial discrimination in criminal procedure and of transplanting American citizens. The principle then lies about like a loaded weapon ready for the hand of any authority that can bring forward a plausible claim of an urgent need. Every repetition imbeds that principle more deeply in our law and thinking and expands it to new purposes. . . .