How does Ishiguro present ideas of honor in "A Family Supper"?

In his short story "A Family Supper," Ishiguro presents traditional Japanese notions of honor in the context of a family in decline. The mother of the house has died; not only that, but her widower has been forced to leave his job after the collapse of his firm.
These deeply traumatic events, following on so quickly from each other, have left the narrator's father with little left to hang on to but an outmoded concept of honor with which to organize the fracturing components of his family life. Honor is about the only thing in his life that makes sense anymore. It is the only constant factor that can provide any semblance of meaning to his daily existence.
Nevertheless, there are limits to the father's attachment to this time-hallowed tradition. His firm failed because his former partner, Watanabe, killed himself out of a warped sense of honor. In conversation with his son, the father expresses disagreement with Watanabe's course of action, indicating that, for him, honor should be drawn upon to strengthen a family, not destroy it. And that's precisely what the father is trying to do by gathering his children together for a special meal, however difficult it may be, and however uncomfortable the silences at the dinner table.