Dogs are a clue to happiness, too, in Ryusuke Hamaguchi’s emotional epic, a staggering work of quiet, profound intimacy. There is much under the hood of “Drive My Car”– art, grief, friendship, Chekhov. A lot of movies are described as “a ride,” but Hamaguchi’s melancholy masterwork, where the opening credits arrive 40 minutes in, earns that label in its own uniquely winding way.

