Ralph Mayberry was executive director of the Los Angeles Baptist Mission Society from 1937-1956. When Japanese pastors were arrested on December 8, 1941, Mayberry went to work advocating for their release. Throughout the following years, he visited assembly centers and incarceration camps to encourage the ministers and congregations of the Southern California Japanese Baptist churches. Jitsuo Morikawa memorialized his actions, noting that they resulted in him being regarded as disloyal and un-American.