"California Birth Index, 1905-1995," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VGHK-C4M : 27 November 2014), Satoshi Hirayama, 17 Feb 1930; citing Fresno, California, United States, Department of Health Services, Vital Statistics Department, Sacramento.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XC61-5N7 : accessed 17 September 2021), Satoshi Hirayama in household of Tokuzo Hirayama, Exeter, Tulare, California, United States; citing enumeration district (ED) ED 25, sheet 5B, line 79, family 117, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 226; FHL microfilm 2,339,961.
"United States Census, 1940," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:K96N-GG6 : 6 January 2021), Satoshi Hirayama in household of George T Hirayama, Exeter Judicial Township, Tulare, California, United States; citing enumeration district (ED) 54-18, sheet 2A, line 35, family 35, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 357.
"United States Japanese Americans Relocated During World War II, 1942-1946," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:KX2L-ZV6 : 12 December 2014), Satoshi Hirayama, 1942-1946; citing Colorado River (Poston, Parker), person number 39621D, file 212010, NARA NAID 1263921, National Archives at College Park, Maryland.