For a change of pace, I'm currently in the Greater Tokyo Metropolitan Area and things in Japan seem fairly normal. On the other hand, supermarkets and most convenience stores are incredibly seasonal and stock completely changed for Fall. The only "shortages" I saw was a brief time between the Summer produce running out and Fall produce getting rotated in. Certain cuts of meat, especially imported meat have been a bit sparse as well, but no empty shelves anywhere. I've talked to some people in the more rural areas up in Tokaido and they haven't noticed much except for a small disruption from the trains stopping due to typhoons and earthquakes (so, you know, life as normal).
A handful of companies have announced price hikes though. I've seen mostly dairy-based products being affected, which will eventually spill over into certain snacks and pastries (one company announcing higher prices is Meiji, who makes some decent cheap chocolate, rip).
Imports like coffee, beef, livestock feed corn, and most worryingly, wheat have also jumped up. Starting in the new year it looks like bread and most noodles are going to get more expensive. While there's a lot of focus on seasonal and fresh food in Japan, most people are ride or die on pre-made convenience food, and I think that kind of manufactured food is going to start taking big hits from all this.
Anecdotally, my fiance's parents are both truck drivers for construction material, and they've mentioned that certain materials are getting hard to find. Silicon, silicate, and plastic materials mostly. Haven't noticed a significant change in fuel prices at a consumer level yet.
Japan's government has suddenly had a huge push for SDGs, they're everywhere, even the borderline propaganda talk shows are doing "comedy" segments about sustainability and recycling and shit. Wonder if it's related at all to this situation.