What is the main conflict in The Sound of the Mountain by Yasunari Kawabata?

The Sound of the Mountain is a novel by Nobel Prize winning writer Yasunari Kawabata. In this novel, Ogata Shingo is a man in his sixties who is beginning to feel the edge of his mortality. Shingo becomes obsessed with his memories and the legacy he will leave behind when he dies. While consumed with memories of the sister of his wife, a woman with whom he was once madly in love, Shingo finds himself growing closer to the young woman who is his son's wife. A complicated situation emerges, causing Shingo to question his own actions in regards to the disaster that has become of both his children's marriages. The Sound of the Mountain is a novel of mortality and the legacy each living being leaves behind upon his death.