Quoting from the Introduction to this documentary on the NHK World On Demand library:
“Deep in the steep mountains of Kumamoto Prefecture, Kyushu, lies the remote village of Kuma. Located on the raging Kuma River, this area was cut off from the rest of Japan in the old days and still retains the feel of yesteryear. On this edition of Journeys in Japan, British actor Dean Newcombe explores this rural region, to meet the people of Kuma and discover their traditions.”
Note: The documentary ends at 28 mins, beyond that the video recaps some of the main scenes and runs upto 40 mins.