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These Iai arts were performed by NAGAE Matasaburo, in his sixties (guess). He was born and lived in Nagasaki, received the 7th grade of Kendo and 8th grade of Iai from Zen-Nippon Kendo Renmei (All-Japan Kendo Federation). He also practiced Shinto Munen style Iai. The original movies were recorded in 8mm films, then edited in a VHS tape. It's not known who took and maintained these films (maybe one of Matasaburo's disciples did). They were converted to DV (digital video) format, stored in HDD, finally created QuickTime H.263 format (360x240, 15fps, compressed).