In a time where cinema was in the whole world was still concerned by representation of lives and social studies, this movie is an intense an important piece. It's great! Strong, hard, oppressing, nice, and emotive. Everything in the hard (but sometimes amazing) life of those workers is showed in it... It's really something the cinema can do at his best. A social study showing every aspect of a style of life, with its private feelings and possible events (thoose who are saying nothing happens mustn't have watched the whole movie. I was surprised by the changing of rhythm in the last 30 minutes).
It's showing everything essential cinema can show: Life, conditions of life, feelings of those who are living, and it's showing it in a very good way. This is a touching and oppressive movie which could maybe even be used as an historical document (for history of the Japanese island farmers in the middle of the XX century) , but also as an intense fiction.