Overview
The ¥1,000 note is currently the lowest value yen banknote and has been used since 1945, excluding a brief period between 1946 and 1950 during the Allied occupation of Japan.
The fifth series (series E) notes are currently in circulation, and are the smallest of the three common bank notes. Extensive anti-counterfeiting measures are present in the newest banknotes. While the older notes are no longer issued, they continue to be legal tender.
Former notes
Series 甲
The first ¥1,000 note was released on 17 August 1945. At the time successive series of bank notes were labelled as series 甲, 乙, 丙, 丁 or as series い, ろ as opposed to series A, B, C, D, E. It measured 172 × 100 mm and featured images of the legendary prince Yamato Takeru and the Shinto shrine Takebe taisha. It was removed from circulation in 1954.
From Wikipedia (CC BY-SA 4.0).