Plays at 19:28, 22:22, 24:25, 29:38, and 38:52. This was at an event organized by drummer Yoshisaburo “Sabu“ Toyozumi, who was a bo stick student of Watazumi’s at the time.
If anyone can translate what he’s saying, or has any further information, please share. Many thanks to Dimitris Rapakousios.