10 years is a long time. However, my brother is a cop and he once reported to the house of 2 elderly siblings where the brother said he was worried about his sister. He had noticed that she was very cold and no matter how many blankets he put over her, he couldn't seem to get her warm. After removing the layers of blankets, the cops found that the woman had passed away weeks earlier (may she rest in peace) and the brother just could not face it so he went into denial. It's sad, but not unheard of, I guess.
If the great filmmaker Yasujiro Ozu were alive today, a great film could be made of these bizarre doings. Kind of gives new meaning to the stereotypical 'Japanese emotional reticence.'