Fukuda was arrested on December 7, 1941, just hours after the
attack on Pearl Harbor. He was classified as a Group A prisoner, who were, "Individuals believed to be the most dangerous and who in all probability should be interned in event of War." Thus, he was among the first Japanese to be arrested. Most other Japanese-Americans were not relocated until March 1942.
Missoula Reverend Fukuda arrived at the
Fort Missoula Internment Camp on December 29, 1941, with other Group A prisoners. Here, prisoners were interrogated by United States government officials regarding their "un-American" activities. At his hearing, Fukuda learned that the
FBI had been tracking him for several years. They presented him with eight charges, including close association with the consuls general of the Japanese Foreign Service; accommodating members of the Japanese government, army, and navy; Meeting with the consuls general of
Germany and
Italy as well as presidents of both German and Italian Societies in San Francisco; being a reserve officer of Japanese army; holding receptions whenever Japanese navy ships visited San Francisco; sending food packages to Japanese army; visiting soldiers in
Manchuria; being a member of Japanese Veterans Society. Fukuda repeatedly maintained that all of his communication was related to spreading the Konko faith to America. During his time in Missoula, he went on a three-week religious fast, losing 60 pounds.
Lordsburg Fukuda was transferred to a camp near
Lordsburg,
New Mexico in May 1942. He led 5:30 morning services for Konko practitioners every day, and regularly gave speeches to the camp, giving him considerable influence with both internees and soldiers. He quickly was appointed leader of his barrack. He was present at the
Lordsburg killing of two internees, Toshiro Kobata and Hirota Isomura. They were shot at point-blank range, and "the other internees in Lordsburg were forced to dig the graves of the two dead men". Fukuda wrote letters to the Spanish Consul and the
Department of Justice, the branch controlling the Lordsburg Camp, demanding an investigation. This eventually resulted in the guard's replacement from the camp. Fukuda routinely sent letters to these groups, along with the
Red Cross and camp officials, when he saw mistreatment or other acts not in accordance with the
Geneva Convention, which gave guidelines for the treatment of prisoners of war. This was the first time he saw them since his initial arrest in 1941. He continued to make speeches and conduct religious services regularly. He publicly stated that he thought
issei (first generation-Japanese immigrants) should stay loyal to Japan, while
nisei (first-generation Japanese-Americans) should be loyal to the United States since they were United States citizens. This was a highly controversial statement, leading to his expulsion from Topaz by July. While at Topaz, Fukuda witnessed the stress on other families who were separated in different camps. Topaz was a relocation center run by the
Department of the Interior in which Group B and C, or less "dangerous", Japanese-Americans were imprisoned. Many families had members in the Department of Justice Camps such as Lordsburg, and the separation caused psychological harm to a good deal involved. Fukuda sent letters to many Japanese families urging them to apply for reunification at the
Crystal City Internment Camp in Texas, the only Department of Justice Camp that housed families. While many had a stigma against these different types of camps, Fukuda argued that Crystal City had superior housing and education, given that it was the government's largest and "premier" camp. As before, he was seen as a person of influence and made the leader of his barrack. The internees in the camp created a governing body whose aims were family reunification and standing up for internees, of which Fukuda was a member. He also helped internee workers get wages from the Santa Fe camp authorities, and he set up a camp newspaper. Said William Kelly, assistant commissioner of the INS, "he (Fukuda) has shown himself in a number of ways to be a troublemaker. He was, without doubt, one of the leaders, if not the leader, of the element at Santa Fe which recently delivered several threatening ultimatums." Upon his arrival, officer in charge Joseph O'Rourke immediately handed him a memo from the Department of Justice that said Reverend Fukuda was forbidden from giving public speeches and holding a position in the camp. Even so, Fukuda still behaved in the same ways as he did in previous camps, holding mass for Konko believers and sticking up for internees. In Crystal City specifically, Fukuda requested the government to supply a new tuberculosis drug to the camp hospital. This was granted and resulted in almost all of the patients being cured. Due to his importance in the camp, as well as his influence feared by the US government, Fukuda was not released from imprisonment until September 29, 1947, over two years after the Japanese surrender of World War II. == After the War ==