Chart of Hiroshima harbor (IJN surveys up to 1926, other sources to 1939). Report No. 3t(6), USSBS Index Section 2

Chart of northern part of Hiroshima Harbor (1928) (city appears on the chart). Report No. 3t(4), USSBS Index Section 2

Chart of Nagasaki Ko to Kuchinotsu Ko (IJN survey, 1925). Report No. 3t(5), USSBS Index Section 2