Introduction

The story of Japanese Americans in the United States is not only a story of courage, community, and service — it is also a story of law. For more than 150 years, laws and court decisions shaped what Japanese immigrants and their American-born children could do, where they could live, what they could own, and whether they were even allowed to call themselves Americans.

Some of those laws were designed to exclude and harm. Others, won through decades of struggle, began to repair the damage. Understanding both sides — the injustices and the hard-fought corrections — helps us see the full picture of what Japanese Americans endured, and what they ultimately helped change for everyone.

This timeline covers three periods: the laws and court cases that came before Executive Order 9066 and the incarceration of World War II (Part One); those that happened during the war itself (Part Two); and those that came after, gradually restoring the rights that had been taken away (Part Three).

PART ONE
Building the Walls (1790–1941)

The Citizenship Barrier

Long before Japanese immigrants arrived in significant numbers, American law had already decided who could and could not become a citizen. The Naturalization Act of 1790 limited citizenship to “free white persons.” The Naturalization Act of 1870 extended that right to people of African descent — but deliberately left out Asians. This was not an oversight. It meant that Japanese immigrants, no matter how long they lived in America or how deeply they contributed to their communities, could never become citizens. And because they could not become citizens, they could not vote, serve on juries, or fully participate in the legal system that governed their lives.

This single barrier — no citizenship — became the legal foundation for almost everything that followed.

School Segregation and the Gentlemen’s Agreement (1906–1907)

Anti-Japanese sentiment was especially strong in California, driven largely by labor groups who feared economic competition from Asian workers. In 1906, the San Francisco Board of Education ordered Japanese American children to attend separate, segregated schools. Japan protested strongly. To avoid a diplomatic crisis, President Theodore Roosevelt stepped in — not to defend the rights of Japanese Americans, but to negotiate a deal. The result was the Gentlemen’s Agreement of 1907, in which Japan agreed to stop issuing emigration passports to laborers. In exchange, San Francisco dropped the segregation order. The children returned to integrated schools, but the message was clear: Japanese people in America were a problem to be managed, not people whose rights deserved protection.

The Alien Land Laws (1913–1923)

California struck again in 1913 with the Alien Land Law, which barred “aliens ineligible for citizenship” from owning agricultural land or signing long-term leases. Since only Japanese (and other Asian) immigrants were barred from citizenship, the law was openly aimed at them without using their name. By 1923, Washington, Oregon, Arizona, Idaho, and Texas had passed similar laws.

Some Issei (first-generation Japanese immigrants) tried to get around the law by putting land in the names of their American-born children, who were U.S. citizens by birth. California responded in 1920 by tightening the law to close even that loophole. The goal was simple: to make it impossible for Japanese families to establish roots, build wealth, or feel at home in America.

Ozawa v. United States (1922): The Door Slammed Shut

Takao Ozawa had lived in the United States for over twenty years. He spoke fluent English. His children attended American schools. He was a Christian. He argued in court that he deserved to be a naturalized citizen — and that his skin was, in fact, lighter than many Europeans.

The Supreme Court disagreed. In a unanimous 1922 decision, the Court ruled that Ozawa was not “white” because he was not Caucasian. Race, not behavior or loyalty or contribution, was the deciding factor. The door to citizenship was officially shut for the Issei — and it would stay shut for 30 more years.

The Immigration Act of 1924: Total Exclusion

The Ozawa decision gave anti-Japanese forces exactly what they needed. If Japanese people could not be citizens, then they could be barred from entering the country at all. The Immigration Act of 1924 — also called the Asian Exclusion Act — did exactly that. It banned the immigration of anyone “ineligible for citizenship,” effectively ending all Japanese immigration to the United States. Combined with the Gentlemen’s Agreement, this meant the Issei community was frozen in place: those already here could not bring new family members, and their children, the Nisei, were caught between two worlds — American by birth, but never fully accepted as American by law or society.

PART TWO:
War, Removal, and Resistance in the Courts (1942–1944)

For a full account of Executive Order 9066 and the incarceration, please see our dedicated essay on that subject. This section focuses on the legal challenges that arose during the war.

When President Roosevelt signed Executive Order 9066 in February 1942, three young Japanese American men decided to fight back — not with weapons, but in court.

Hirabayashi v. United States (1943)

Gordon Hirabayashi was a 25-year-old University of Washington student and a Quaker who believed deeply in civil disobedience. He deliberately violated the military curfew that had been imposed on Japanese Americans and refused to report for removal to a camp. He turned himself in to the FBI.

In 1943, the Supreme Court ruled against him unanimously. The justices said that in a time of war, the military had the authority to impose a curfew on people based on their ancestry, and that courts should defer to military judgment. Hirabayashi went to prison.

Yasui v. United States (1943)

Minoru Yasui was an Oregon attorney and a commissioned officer in the U.S. Army Reserve. He had resigned from the Japanese consulate the day after Pearl Harbor to offer his services to the U.S. military — and been rejected because of his ancestry. He deliberately walked the streets of Portland after curfew, with a copy of the curfew order in his pocket, trying to get arrested so he could challenge it in court. He had to turn himself in at a police station before anyone would arrest him.

The Supreme Court ruled against him, as well as a companion case to Hirabayashi decided the same day, June 21, 1943. Yasui was sent to the Minidoka incarceration camp.

Korematsu v. United States (1944)

Fred Korematsu was a 23-year-old welder from Oakland who simply refused to leave his home. He had altered his name and appearance to avoid detection, hoping to stay with his Italian American girlfriend. When he was caught, he was convicted of violating the exclusion order.

In December 1944, the Supreme Court upheld his conviction 6–3, ruling that the forced removal of Japanese Americans was a military necessity. It is now considered one of the worst decisions in the history of the Court. Justice Robert Jackson, in dissent, warned that the ruling was “a loaded weapon, ready for the hand of any authority that can bring forward a plausible claim of an urgent need.”

Ex parte Endo (1944): A Small but Important Victory

On the exact same day the Court decided Korematsu, it also ruled in the case of Mitsuye Endo — and this time, the result was different.

Endo was a 22-year-old California state employee who had been removed from her job and sent to the Tule Lake camp. She refused government offers to release her if she agreed not to return to the West Coast. She wanted to prove a principle: that a loyal American citizen could not be held without cause. She stayed in camp for over two years to fight her case.

The Court ruled unanimously in her favor. A citizen who was “concededly loyal” could not be detained indefinitely, the justices said. The government knew the decision was coming — the day *before* it was announced, the War Department quietly rescinded the exclusion orders so the camps could begin to close without the Court having to go further. Endo’s quiet, determined stand had cracked the incarceration system open.

PART THREE:
Rebuilding — Laws That Restored Rights (1945–2018)

The end of the war did not bring a quick return to justice. When Japanese Americans came home, they found their property taken, their businesses gone, and hostility still waiting for them in many communities. Rebuilding would take decades — and would require continued fights in legislatures and courtrooms.

The Evacuation Claims Act (1948)

Congress passed the Japanese American Evacuation Claims Act to allow families to file claims for property they had lost. It was a start — but only a small one. The process was slow, the payments were far too low to cover actual losses, and many families had no documentation left to file a claim. It was a gesture of acknowledgment that fell far short of real justice.

Oyama v. California (1948)

Fred Oyama was a U.S. citizen, born in California. His father, Kajiro, was a Japanese immigrant who had purchased farmland in Fred’s name. California seized the land under the Alien Land Law. The Supreme Court ruled in Fred’s favor, finding that California had violated the equal protection rights of U.S. citizen children. The ruling was narrow — the Court declined to strike down the Alien Land Law entirely — but it was a signal that the law’s days were numbered.

McCarran–Walter Act (1952): Citizenship at Last

Thirty years after the Ozawa decision slammed the door on naturalization, Congress passed the Immigration and Nationality Act of 1952, also known as the McCarran-Walter Act. For the first time, it eliminated racial barriers to naturalization entirely — meaning the Issei could finally become American citizens. Many were in their sixties, seventies, and eighties. Some had waited their entire adult lives for this moment.

California Repeals Its Alien Land Law (1956)

In 1956, California voters approved a ballot measure to remove the Alien Land Law from the books. It had already been ruled unconstitutional, but its formal repeal was a symbolic moment — a public acknowledgment that the law had been wrong from the start.

The Coram Nobis Cases: Convictions Overturned (1983–1987)

In the early 1980s, a team of young lawyers — many of them Japanese Americans — found government documents proving that the Justice Department’s lawyers had deliberately hidden evidence from the Supreme Court in 1943 and 1944. Military and intelligence reports had clearly shown that Japanese Americans posed no threat to national security. Government attorneys had known this — and had suppressed the information to win their cases.

Armed with this evidence, legal teams filed what are called “coram nobis” petitions — a rare legal tool used to correct serious errors in old convictions. In 1983, Fred Korematsu’s conviction was vacated by a federal district court. Gordon Hirabayashi’s convictions followed in 1986–87. Minoru Yasui’s case was also dismissed. All three men were vindicated — decades late, but at last.

The Civil Liberties Act of 1988: Apology and Reparations

The most significant act of redress came on August 10, 1988, when President Ronald Reagan signed the Civil Liberties Act of 1988 into law. The bill — introduced in the House as H.R. 442, deliberately numbered after the 442nd Regimental Combat Team — did three things:

1. It issued a formal apology from the U.S. government to Japanese Americans who had been incarcerated.

2. It acknowledged that the incarceration had been caused by “race prejudice, war hysteria, and a failure of political leadership” — not military necessity.

3. It provided $20,000 in reparations to each surviving internee.

The bill was championed by Japanese American members of Congress, including Congressman Norman Mineta, who had himself been incarcerated as a child, and Senators Spark Matsunaga and Daniel K. Inouye, both decorated veterans of the 442nd. Payments began in 1990 and continued until 1993. By that time, many who had suffered most had already died.

(Note: Tucson resident Carolyn Sugiyama Classen, a Sansei attorney from the Big Island of Hawaii, was Legislative Aide to Senator Inouye in 1979-1980 on Capitol Hill. She was instrumental in the passage of S.1647 (P.L.96-317), which created the National Commission on Wartime Relocation and Internment of Civilians,which investigated the wrongs done to Japanese Americans during WWII.)

Korematsu Formally Overruled (2018)

For decades, the Korematsu decision sat in the law books — never officially overturned, only widely condemned. That changed in 2018, when the Supreme Court decided a case called Trump v. Hawaii. Although the Court upheld the travel ban in that case, Chief Justice John Roberts used the majority opinion to formally repudiate Korematsu, writing that it “was gravely wrong the day it was decided” and “has no place in law under the Constitution.”

What This History Teaches Us

It had taken 74 years. But the legal stain of Korematsu was finally erased.

Looking at this timeline, a few things stand out.

First, discrimination rarely arrives all at once. The exclusion of Japanese Americans was built step by step — one law, one court ruling, one policy at a time — over more than 50 years before the incarceration ever happened. Each step made the next one easier.

Second, the people most harmed by these laws never stopped fighting. Gordon Hirabayashi, Minoru Yasui, Fred Korematsu, and Mitsuye Endo didn’t have to do what they did. They took on the government — and lost at first — because they believed in the Constitution’s promises, even when the country did not live up to them.

Third, justice moves slowly — but it can move. The same legal system that upheld mass incarceration in 1944 eventually overturned those convictions, issued a formal apology, and paid reparations. That doesn’t erase the harm. Nothing can. But it shows that the struggle to hold America accountable to its own ideals is not hopeless.

The people whose stories are told on this website — those who were incarcerated, those who served in the 442nd, those who came home and rebuilt — were living through all of this at the same time. Their resilience deserves to be understood in that full context.