Here is a video of one of Sensei's iaido teachers. His name is Takeshi Mitsuzuka. Surprisingly, there are very few videos of him doing Iaido. Sensei studied under him in the early 1980s and this video is right around the time. Mitsuzuka Sensei was a student of Nakayama Hakudo who founded Muso Shinden Ryu Iaido. He passed away in 2008 at the age of 88 almost exactly one year after Sensei. https://www.youtube.com/watch?v=4mp55f34JPY&app=desktop