If you want better food you may as well hoof it to Koreatown especially if you think you may have to use the toilet. The toilets at Penn Station are truly the things of nightmares. I didn't go to Koreatown because I had a bunch of luggage, but that's another problem you wouldn't have in Japan.
Meanwhile the food options at SFO are generally pretty decent (if pricey) and the sushi place seems to be a surprisingly good value. If the Salesforce Transbay Terminal ever reopens it'll be interesting to see if the city puts any effort at attracting decent food there.
Now I'm curious, what was the disaster?
https://matome.naver.jp/odai/2135743773494825901
Japanese expect their food to look pretty much exactly like the picture or wax model that is displayed in front of the shop.
Over priced garbage (fast food) -> high salt/sugar/wtf ever intake -> Health issues -> Overpriced garbage ('super' foods, supplements)