A heart-warming tale about an elderly woman's struggles with dementia as seen from the perspective of her young grandson, "Grandma is Okay" ("Baba wa, Daijobu") is the latest movie by Yokohama-born filmmaker Jacky Woo.

Based on Akiko Kusunoki's picture book of the same name, it stars veteran actress Manami Fuji, whose portrayal of the suffering grandmother is both touching and realistic.

The standout performance, however, undoubtedly comes from male lead Kokoro Terada, a child actor who doesn't turn 11 until next month. He has already featured on a variety of TV shows and films, but he is probably best-known for starring in a toilet commercial that has racked up more than 1.8 million views on YouTube.