At a daycare center for senior citizens in western Japan, staff interview elderly people and write down their memories of long ago. Many who come to the center have dementia. They may not remember recent events but can vividly recall things from bygone days. The memories of a hometown now at the bottom of a lake, harsh experiences on the battlefield, and other precious stories can serve as valuable documents for future generations. An unexpected benefit of the activity is helping activate the brain and slowing the progress of dementia.

76 years after the end of World War II, work to dispose of unexploded munitions is still an everyday sight in Okinawa Prefecture, southwestern Japan. It will probably take 70 years to remove all of them. Renowned expert Sunagawa Masahiro has dedicated more than 40 years to finding dud explosives that still lie buried and has so far located thousands of them. He has now taken up a new challenge: developing an AI probe to discover buried explosives. He is also dedicated to training his successors, aiming to pass on not just his skills but also the spirit of Okinawa to the next generation. The program follows his challenge.