Oldman, The site has been revised, and changed form Kise Kusanku to Nishime - Kushanku. Apparently someone realized there was a mistake. I agree I first saw Kise Sensein in Penna, in the early 80's, and he was much older than that video.
Doing a google - Nishime began training in Shorin-ryu Karate when he was 14 years old. He belonged to the Shima Dojo and his teachers were Sensei Shima, Sensei Kishaba, and Sensei Taba. He also studied the Yamani Ryu system of weapons from Sensei Kishaba’s younger brother
bushi no te isshinryu
offering free instruction for 30 years