Bujinkan Tokyo 80’s

I hope someone can provide me with the correct date for this event. Just a juwel from the eighties: scenes: 1 abc Ishizuka Sensei 2 a Oguri Sensei 3 ab Someya Sensei 4 ab Shiraishi Sensei 5 a Nagase Sensei 6 ab Noguchi Sensei 7 abcd Seno Sensei 8 a Hatsumi Sensei I know this footage is taken off video/television-screen. And even these were copies of copies.