I read that some of the people wrote about a sushi restaurant called "Sukiyabashi Jiro" and reviewed the related materials I owned.
The DVD "JIRO DREAMS OF SUSHI" was produced in 2011 (voice is Japanese and English subtitles). The book "Sukiyabashi Jiro Jiro Shun" was published in 1997 and the paperback version was published in 2001. I don't like artisans, entertainers, sportsmen, etc. to give strange lectures and lessons, but I don't feel that bad on this DVD.
Poor people like me can't enter a high-end sushi restaurant that costs more than 30,000 yen at a time, and I don't want to enter at all, but I went to visit only for the location and appearance of the store for reference I have. This sentence describes "history and culture" instead of "gourmet information".
As your eldest son stated, the question is how to maintain the operation of the store after the death of this charismatic husband.