I watched a YouTube video about why egg prices have become like this, and the content is...

In 2017, pesticide residues were found in eggs, causing eggs to disappear nationwide.
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Since then, various laws have been enacted,
which has directly led to increased production costs.
Requirement to print shell numbers = increased equipment and procedural costs
Requirement to secure floor space = decrease in the number of birds raised
Restrictions on certain medications = use of alternative medications (which are more expensive)
This has led to a decrease in supply.
Large-scale farms are making money even in this situation by reducing costs through economies of scale,
but small-scale farms cannot achieve economies of scale and are actually running at a loss the more they produce.
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Meanwhile, people are consuming more eggs than before.
Egg consumption has increased significantly over the past 10 years.
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In the midst of this, a law was passed requiring rearing areas to be 50% larger.
Starting one year from now, the number of birds that can be raised per unit area is expected to decrease by 33%.
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I saw American eggs in the supermarket; I guess there's a reason they've been coming in...