Guy Lodge Film Critic Even the most solidly founded of marriages can be strained and shattered by the death of a child. For handsome, wholesome Japanese couple Taeko and Jiro, however, that tragedy shows up all the fault lines that were already in their young relationship, and that’s before living ghosts of the past show up for both partners. Koji Fukada’s “Love Life” unabashedly embraces melodramatic contrivance in its examination of modern middle-class love tested as much by social prejudices as by personal demons; it just does so with such pallid, polite reserve that its sentimentality never becomes transcendently moving. As such, this agreeable but overlong pic finds the Japanese writer-director still struggling to regain the form of his jolting 2016 Cannes prizewinner “Harmonium.”