The oldest example of Haishakukin that can be confirmed from the record was the one at the time of Osaka Fuyu no Jin (Winter Siege of Osaka) during Osaka no Eki (The Siege of Osaka), at which time, Edo-jo Castle was under construction, therefore it seems that the loan was issued in consideration of the double burden of the construction and the military service.
記録で確認できる最古の例は大坂の役大坂冬の陣の時のことであり、当時江戸城の普請が進行中であったことから、普請と軍役の二重負担に配慮して支給されたものと考えられている。