Most oral histories currently on the market focus on people over 70 years of age. These people directly witnessed the Japanese occupation and the arrival of the Nationalist government; they went through war and have seen tremendous political and economic changes. Their testimony is especially helpful in compensating for the dearth of data about the last ten years of Japanese colonial rule (1935-1945).
目前坊間盛行的口述歷史，一般以七十歲以上的耆老為對象，因為他們曾經歷日據、國民政府來台兩個時代，走過戰爭，及戰後政治經濟變遷的歲月，尤其是對於日本統治最後十年的歷史資料的補充，很有幫助。