Japan has a rice shortage. Of staple rice.
While there has been sporadic rice shortages around the world recent years, Japan is a first world country and a traditional rice producer. The problem is word traditional. According to First Post, the average age of Japanese rice farmer is 71 years, and government agricultural policies in general and rice policies in particular have hit the farmers whose numbers, citing Bloomberg, have shrunk by 25% between 2015 and 2020s.

Probably not Japanese boiled rice
The Japanese government rice policies are strictly nationalistic, ostensibly designed to protect Japanese rice farmers and self-sufficiency by preventing rice buying from abroad. Except the consumer prices also had to be regulated, squeezing rice farmer incomes and acreage despite Japanese soft monopoly on domestic rice.
The some explanations to Japanese rice shortages is that Japanese 2023 rice harvest was bad (already reporting rice rationing in some shops on 2024), there was an earthquake and people are panic buying (also as a hedge for rice inflation, which probably increases the rice shortfall causing more rice inflation), people are eating more rice because the war in Ukraine has increased wheat prices, and that there are hordes of tourists eating rice. And the Japanese government started selling the stored rice from reserves last year. A bit like US sells oil every now and then from strategic reserves to smooth consumer sentiment. Except that Rice News Today blames the shortage on government policy to reduce rice production, which has thinned the buffer between production and consumption to such extent that even slightest consumption increase would cause shortages.
Now Japan is running low on rice and some shops have implemented rationing. People are upset about the steep rise in rice prices. There has been some talk about buying rice from abroad, but this is against resistance from farming lobby and conservatives, though apparently there is now a trade deal to sell Calrose rice to Japan.
The Japanese are having an election soon, July 20th. The price of rice and the rice shortages (estimated 1.8 months of annual supermarket sales worth of staple rice – either the consumers will consume something else or Japan will soon import lots of rice) may annoy the electorate enough to lead to political upset. According to Zerohedge, SocGen (a French bank) has predicted that there is about 50% chance of election results leading to governmental crisis in Japan, which may lead to problems in yen bond market. More importantly, the price of rice is part of Japan’s inflation metrics, and if rice prices explode, the rising inflation may trigger BOJ rate hikes.
The global bond markets are highly interconnected and the financial omnibubble is floating around in search of a pin prick. Thus, the rising rice crisis just could be the trigger of global financial collapse. Though I personally doubt it. The markets are so rigged that full collapse by contagion is unlikely. But what I have seen over the years, is that small retail investors rarely fare well in turbulence.