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“Her history is full of errors.”

Data visualizations about the magnitude of the injustices of the Japanese American incarceration camps of World War II

Pictured: Pledge of allegiance at a school in San Francisco, California in 1942.
Photographed by Dorothea Lange.

"Sometimes America failed and suffered… Sometimes she made mistakes, great mistakes…

Her history is full of errors, but with each mistake she has learned…

Can we the graduating class of Amache Senior High School believe that America still means freedom, equality, security, and justice? Do I believe this? Do my classmates believe this? Yes, with all our hearts, because in the faith, in that hope, is my future, and the world’s future."

— Excerpt from a 1943 valedictorian speech by Japanese American student Marion Konishi given while she was at the Granada (Amache) incarceration camp in southeastern Colorado

“I am an American.”

Pictured: Japanese Americans line up to be registered prior to forced relocation.
Photographed by Dorothea Lange.

In February of 1942, President Franklin D. Roosevelt signed Executive Order 9066, effectively forcing the relocation of more than 120,000 Japanese Americans living on the West Coast to one of ten incarceration camps located across the western half of the United States.

Driven by racial and xenophobic fears, Executive Order 9066 and the Japanese American incarceration camps that followed are now remembered as dark moments in our nation’s history — when they are remembered at all.

Forced into incarceration camps in places that many of those forcibly relocated had never been to, Japanese Americans faced economic, physical, and emotional hardships as their loyalties and citizenship were questioned all under a false premise of national security.

"I am an American."

— A sign hanging outside of a store front in Oakland, California, placed there by the store’s owner, a Japanese American and graduate of the University of California, after Executive Order 9066 was issued

120,313

Persons of Japanese descent who were forcibly relocated

In contrast, approximately 11,500 persons of German descent and 3,000 persons of Italian descent were detained.

Data visualization featuring a series of dots of the percentage of incarcerated Japanese Americans who were born in the United States where white dots show portion who were born in United States and gray dots show portion born elsewhere

65%

Percentage of incarcerated Japanese Americans who were born in the United States

“I have been born, reared, and educated in American institutions.”

Pictured: A grandfather and grandson at the Manzanar incarceration camp in 1942.
Photographed by Dorothea Lange.

Enacted after the bombing of Pearl Harbor, Executive Order 9066 was a xenophobic decision that called for forced relocation of U.S. residents simply based on the premise of ethnicity. Anyone who was at least 1/16th Japanese, including thousands of young children and the elderly, was forcibly removed from their homes and communities.

Japanese Americans living in the “West Coast Evacuation Zone” were given little notice to pack what they could carry. With limited information about where they were going and when they might be able to return to their homes, they had almost no time to make arrangements for their homes, farms, businesses, and more to be taken care of. Overnight, the fact that many of the Japanese Americans were vital parts of their communities — as friends, acquaintances, neighbors — was lost.

"I have known no other nation than the United States. I have been born, reared, and educated in American institutions. My mind has absorbed American influence and ideals of freedom. And I would like very much to continue residing in the atmosphere of these ideals."

— Excerpt from a 1944 letter by Tadao Mukaikata declining repatriation while he was incarcerated at the Amache (Granada) incarceration camp

Japanese Americans served in a variety of different roles in their communities and many labored in essential work, such as in agriculture, prior to being forcibly relocated.
Bar chart showing labor and occupation data of incarcerated Japanese Americans prior to being forcibly relocated

There were a total of 10 incarceration camps and 15 assembly centers.

The West Coast Evacuation Zone dictated by Executive Order 9066 spanned multiple states: all of California and portions of Washington, Oregon, and Arizona.

Japanese Americans living in this zone were forcibly relocated — first to an assembly center and then eventually to a camp. These assembly centers were essentially temporary concentration camps whose primary purpose was to enable the immediate incarceration of Japanese Americans.

These 10 incarceration camps were located throughout the western half of the United States, with two camps as far east as Arkansas.

Assembly centers are indicated by smaller dots.

Map showing location of the West Coast Evacuation Zone, assembly centers, and incarceration camps in the United States

The first camp, Poston, opened on May 8, 1942 in Arizona. The last camp to close was Tule Lake in California on March 20, 1946.

Indicates peak population of camp and approximately when it was reached. Camps are ordered by peak population, from largest to smallest.

Chart depicting peak population and when it was reached, opening date, closing date, and days of operation for each camp

Of the ten camps, Tule Lake — located near the border of Oregon and California —  had the largest population of incarcerated people and was one of the first to open and last to close.  Many of those incarcerated here were deemed “unloyal” for various reasons, and Tule Lake was the only camp to be ruled under martial law and eventually converted into a maximum security camp.

In contrast, Jerome, a camp less than 30 miles from Rohwer and both located in Arkansas, was one of the last camps to open and the first to close. With a high number of repatriations and dissenters, many of those incarcerated at Jerome were eventually relocated to Tule Lake and other camps.

In total, these incarceration camps would be in operation for more than 1,412 days.

Cumulative area chart showing total population of incarcerated Japanese Americans from 1942-1946 in the camps along with key annotations of historical events like EO 9066 and the closing of the camps

“You try to be a good citizen, you try to do what you're supposed to be doing, and the rejection is very hard, difficult.”

Pictured: Japanese American woman and child sitting near a camp barrack.
Photographed by Dorothea Lange.

"You grow up thinking you're a citizen, and you want to be a part of this society you're in, and then the, let's say the weight of the rejection, is something that was pretty unexpected.

But when reality sets in, like the "Camp Harmony" and these little shacks in Minidoka, then the real negative things start coming to your head, you know. "What the hell is this?" And I think it bothered a lot of us tremendously.

You try to be a good citizen, you try to do what you're supposed to be doing, and the rejection is very hard, difficult."

— Excerpt from an interview with Masao Watanabe in 1998 as he reflects on his experience being forcibly incarcerated

Click through to learn more about each camp.

Amache

Location: Prowers County, Colorado
Peak Population: 7,318 people

Date of First Arrival: August 27, 1942
Date of Last Departure: October 15, 1945
Longest Potential Stay: 1,145 nights

Top 3 Home Counties of Those Incarcerated

  • Los Angeles County, CA (3,181 people)
  • Sonoma County, CA (696 people)
  • Yolo County, CA (666 people)

Gila River

Location: Pinal County, Arizona
Peak Population: 13,348 people

Date of First Arrival: July 20, 1942
Date of Last Departure: November 10, 1945
Longest Potential Stay: 1,209 nights

Top 3 Home Counties of Those Incarcerated

  • Los Angeles County, CA (4,952 people)
  • Fresno County, CA (1,972 people)
  • Santa Barbara County, CA (1,797 people)

Heart Mountain

Location: Park County, Wyoming
Peak Population: 10,767 people

Date of First Arrival: August 12, 1942
Date of Last Departure: November 10, 1945
Longest Potential Stay: 1,186 nights

Top 3 Home Counties of Those Incarcerated

  • Los Angeles County, CA (6,448 people)
  • Santa Clara County, CA (2,572 people)
  • Yakima County, WA (843 people)

Jerome

Location: Drew & Chicot County, Arkansas
Peak Population: 8,497 people

Date of First Arrival: February 11, 1943
Date of Last Departure: June 30, 1944
Longest Potential Stay: 633 nights

Top 3 Home Counties of Those Incarcerated

  • Los Angeles County, CA (3,147 people)
  • Fresno County, CA (2,013 people)
  • Sacramento County, CA (993 people)

Manzanar

Location: Inyo County, California
Peak Population: 10,046 people

Date of First Arrival: July 22, 1942
Date of Last Departure: November 21, 1945
Longest Potential Stay: 1,269 nights

Top 3 Home Counties of Those Incarcerated

  • Los Angeles County, CA (8,828 people)
  • Sacramento County, CA (370 people)
  • Kitsap County, WA (226 people)

Minidoka

Location: Jerome County, Idaho
Peak Population: 9,397 people

Date of First Arrival: August 10, 1942
Date of Last Departure: October 28, 1945
Longest Potential Stay: 1,175 nights

Top 3 Home Counties of Those Incarcerated

  • King County, WA (6,098 people)
  • Multnomah, OR (1,927 people)
  • Pierce, WA (1,051 people)

Poston

Location: Yuma County, Arizona
Peak Population: 17,814 people

Date of First Arrival: September 2, 1942
Date of Last Departure: November 28, 1945
Longest Potential Stay: 1,300 nights

Top 3 Home Counties of Those Incarcerated

  • Los Angeles County, CA (2,750 people)
  • Tulare County, CA (1,952 people)
  • San Diego County, CA (1,883 people)

Rohwer

Location: Desha County, Arkansas
Peak Population: 8,475 people

Date of First Arrival: September 18, 1942
Date of Last Departure: November 30, 1945
Longest Potential Stay: 1,169 nights

Top 3 Home Counties of Those Incarcerated

  • Los Angeles County, CA (4,324 people)
  • San Joaquin County, CA (3,516 people)
  • San Francisco County, CA (80 people)

Topaz

Location: Millard County, Utah
Peak Population: 17,814 people

Date of First Arrival: September 11, 1942
Date of Last Departure: October 31, 1945
Longest Potential Stay: 1,146 nights

Top 3 Home Counties of Those Incarcerated

  • Alameda County, CA (3,679 people)
  • San Francisco County, CA (3,370 people)
  • San Mateo County, CA (722 people)

Tule Lake

Location: Modoc County, California
Peak Population: 17,814 people

Date of First Arrival: May 27, 1942
Date of Last Departure: March 20, 1946
Longest Potential Stay: 1,393 nights

Top 3 Home Counties of Those Incarcerated

  • Sacramento County, CA (4,984 people)
  • King County, WA (2,703 people)
  • Placer County, CA (1,807 people)

“What do they know about loyalty?”

Pictured: A dust storm blows through the Manzanar camp.
Photographed by Dorothea Lange.

During the first year in the incarceration camps, all adults were administered what would eventually become informally known as the “loyalty questionnaire.”

In this questionnaire, two particular questions (#27 and #28) proved exceptionally confusing. The first asked if the individual would serve in the U.S. military whenever and wherever ordered and the second asked if the individual would swear unqualified allegiance to the United States. After having been forcibly relocated simply on the basis of their ethnicity, many had issues answering the questions and were thus deemed potentially unloyal. Many of the men who answered no to both questions became known as “no-no boys.”

To this day, the questionnaire brings up questions about what we consider loyalty and the arbitrary nature of assigning “loyal” and “disloyal” labels.

"If they want to segregate me they can do it. If they want to take my citizenship away, they can do it. If this country doesn't want me they can throw me out. What do they know about loyalty?"

— Transcript from an interview with Morgan Yamanaka who answered no to both loyalty questions while incarcerated

Almost 3,600 Japanese Americans served in World War II for the United States.
Almost all of the camps had Japanese Americans who lost their lives fighting for a country that questioned their loyalty.

Inducted and returned after war

Inducted and killed, wounded, or missing after war

Bar chart of induction and casualty data for each camp where white indicates those who were inducted and returned after the way and gray indicating those who were inducted but killed, wounded, or missing in action after the war

Almost 5% of those incarcerated renounced their U.S. citizenship, sometimes out of protest and other times under duress. Formal applications had to be approved by the U.S. Attorney General.

This was a result of the Denaturalization Act of 1944, the first law that allowed U.S. citizens to renounce their citizenship in times of war. The law had strong support from legislators who were already looking for ways to strip Japanese Americans of their citizenship.

Cumulative area chart of citizenship renunciation data from 1944 to 1946

“My grandmother didn’t believe she would ever come back.”

Pictured: Japanese American tenant farmer prepares to be forcibly relocated.
Photographed by Dorothea Lange.

In 1945, as World War II was drawing to a close, the federal government started to plan for the closing of the camps, deeming the period of “military necessity” for the camps to be over.

By the time the war had ended and the camps were closed, Japanese Americans had lost a collective $400 million in property during their incarceration. Many tried to return to their communities to find their homes, farms, and property were no longer theirs. Many gave up returning altogether and relocated somewhere else entirely after the war.

"My grandmother was in her 60s, my grandfather was 75. We had no idea where we were going, how long we would be gone, what would happen to us. So she didn’t believe she would ever come back."

— Excerpt from an interview with Marielle Tsukamoto in 2019 reflecting on her experience in the incarceration camps. Marielle was just 5 years old when her family was forcibly relocated from Sacramento, California.

In some counties, such as Fresno County in California, a majority of the pre-war Japanese American population returned, but in other counties, such as Monterey County in California, the percentage who returned was much lower.

Only the 10 counties with the largest pre-war Japanese American populations are shown below.

Bar chart depicting percentage of the pre-war Japanese population that returned after the war for the ten most populated counties in terms of the Japanese American population prior to the war
“There was no organized protest when we were incarcerated. Now we use our culture, values and personal histories to protest the repetition of that history.”

— Satsuki Ina, a psychotherapist and documentary filmmaker born at the Tule Lake camp, in a 2021 interview with the Los Angeles Times

Through the end of World War II, the War Relocation Authority (WRA) was responsible for enforcing Executive Order 9066, all while maintaining detailed data and records about those who were incarcerated. The data the WRA kept was combined into a report more than 200 pages long titled The Evacuated People: A Quantitative Description.

The majority of the data used for this project comes from this report.

Notably, there are ethical concerns and limitations with using this data, since all of this data was collected about a group of people who were not in a position to fully give consent. It is my hope that I have used this data with the utmost respect and care given the traumatic nature of this history.

The cover and an inside page of the War Relocation Authority's report about the camps titled The Evacuated People: A Quantitative Description

For More Information

Densho ➡

A nonprofit started in 1996 dedicated to documenting the stories of Japanese Americans forcibly incarcerated during World War II

Japanese American National Museum ➡

A Smithsonian affiliate located in Los Angeles, California that documents the stories, experiences, and contributions of the Japanese American community

Japanese American Citizens League ➡

One of the oldest organizations dedicated to securing and safeguarding the rights of Asian Americans and Pacific Islanders

This is a project by Linda He, created as part of the Maryland Institute College of Art’s Data Analytics and Visualization MPS program.

Citations

Dataset

United States Department of the Interior, War Relocation Authority (1946). The Evacuated People: A Quantitative Description [Data set]. U.S. Government Printing Office.

Content Sources

Behind the Wire. (n.d.). Library of Congress. Retrieved November 16, 2021.‍

Densho. (n.d.). Densho.   

Densho. (n.d.). Terminology. Densho.

Densho. (n.d.). Jerome. In Densho Encyclopedia. Retrieved November 20, 2021 

Densho. (n.d.). Gila River. In Densho Encyclopedia. Retrieved November 20, 2021  

Densho. (n.d.). Loyalty Questionnaire. In Densho Encyclopedia. Retrieved November 20, 2021.

Densho. (n.d.). Tule Lake. In Densho Encyclopedia. Retrieved November 20, 2021.

Do, P., Lu, J., & Ylanan, A. (2021, March 20). The ‘No-Nos’ of Tule Lake. Los Angeles Times.

History.com Editors. (2009, November 16). FDR orders Japanese Americans into internment camps. HISTORY.

History.com Editors (2009, October 29). Japanese Internment Camps. HISTORY.

Inouye, Karen (2017, February 17). Reliving Injustice 75 Years Later: Executive Order 9066 Then And Now. American Historical Association.

Japanese American National Museum. (n.d.). About JANM.

Justice Deferred: Executive Order 9066 and the geography of Japanese American imprisonment. (n.d.). Justice Deferred. Retrieved December 4, 2021.

Konishi, M. (1943). America, Our Hope is in You [Speech transcript]. Amache.org.

Linke, Konrad. Assembly centers. (2020, August 24). Densho Encyclopedia. Retrieved 07:31, December 6, 2021.

Loyalty: The Questionnaire. (n.d.). Smithsonian National Museum of American History, Behring Center. Retrieved November 10, 2021.

Permanent Camps. (n.d.). Smithsonian National Museum of American History, Behring Center. Retrieved November 10, 2021.

National Park Service, U.S. Department of the Interior. (n.d.). Japanese American Life During Internment

National World War II Museum. (n.d.). Japanese American Incarceration.

Tule Lake Committee. (n.d.). History. Tule Lake Committee.

Ukai, Nancy (2018, September 24). Sogioka's Paintings. 50 Objects/Stories - The American Japanese Incarceration.

Varner, Natasha. (n.d). Sold, Damaged, Stolen, Gone: Japanese American Property Loss During WWII.

Yoshida, H. (2021). Redress and Reparations for Japanese American Incarceration. The National WWII Museum.

Zentner, E. (2019, June 4). What Happened To The Property Of Sacramento's Japanese American Community Interned During World War II? CapRadio.