Journey to the Shore (2015) on Netflix

Plot summary

Mizuki teaches piano to children. Her husband Yusuke vanished three years ago, and then one day he appears at their home as a ghost. He tells her that he drowned in the sea, that his body was never found, and that crabs ate it. In the time since, he has wandered across Japan, becoming acquainted with the living and with others who are like him. He invites Mizuki to come along with him. She agrees, and the two set off to see the beautiful spots he came to know and to call on the people who treated him kindly on his travels.