Dr. Yoshiro Nakamats feels pity for women with small breasts. Among his 3,357 patents, therefore, is one for a new bra, a model that’s comfortable and unrestraining but still makes tiny boobs appear “big and beautiful.” Nakamats unveils his latest project, with complete seriousness, at his 80th birthday party in The Invention of Dr. Nakamats, a fascinating look at the unrelenting Japanese inventor who’s become the Dr. Oz of gadgetry in Tokyo and around the world. Kaspar Astrup Schröder’s film offers an artfully balanced biography that portrays Nakamats as both genius and loony toon: You’ll marvel at his water-powered pedicab, giggle at the Viagra-for-women Love Jet spray that he claims will save his underpopulated (!) country (“No need foreplay!”) and blanch when he demonstrates how he gets inspired, which involves depriving himself of oxygen underwater until nearly the point of death. Nakamats also plans on living to 144, sleeping four hours a night and eating only one meal a day. (His 34-year study of the healthiest foods, for which he photographed every meal he ate and then examined his blood afterward, won a prize for nutrition.) That may sound crazy, but the doctor hardly looks his age, is obviously still sharp, and has the body of a prize fighter. Just as with even the wackiest of the inventions he demonstrates onscreen, you can’t argue with the results.

At 12:30 p.m. at AFI Silver Theater 2; also on Saturday, June 26, at 1:15 p.m. at the Discovery HD Theater.