Historian Gordon Prange notes that it was "the rapidity with which the three resident Japanese went over to the pilot's cause", which troubled the Hawaiians. "The more pessimistic among them cited the Ni‘ihau incident as proof that no one could trust any Japanese, even if an American citizen, not to go over to Japan if it appeared expedient."[7]
Novelist William Hallstead argues that the Ni‘ihau incident had an influence on decisions leading to the Japanese American internment. According to Hallstead, the behavior of Shintani and the Haradas were included in a navy report. In the official report, authored by Navy Lt. C.B. Baldwin and dated January 26, 1942, Baldwin wrote, "The fact that the two Ni‘ihau Japanese who had previously shown no anti-American tendencies went to the aid of the pilot when Japan domination of the island seemed possible, indicate likelihood that Japanese residents previously believed loyal to the United States may aid Japan if further Japanese attacks appear successful."[8]