Cultures and desires clash in the melancholy Japanese comedy ‘Oh Lucy!’

The Lucy in “Oh Lucy!” is a droopy middle-aged Tokyo office worker named Setsuko Kawashima (Shinobu Terajima), who abruptly decides to take a break from her gloomy, deadening routine. At the insistence of her upbeat young niece, Mika (Shioli Kutsuna), she joins an English class, held in a shady-looking…