I think there seem mainly two reason for "why".

At first, the season.

After the long winter has ended, bears also have finished their hibernation and may come down to the humans' area for food. Very unfortunately, bears learned that they can get foods in humans' realm, will be shoot to death, otherwise they would keep coming for foods, may harm to humans. In mountain areas, this battle has been kept going for about hundreds of years and still are going. There are special slaughter houses that can process the shoot bear to meat.

The second reason was because of Covid-19.

Amid the virus, many of restaurants were forced to be closed. Instead, the market demands for vending machines that sell frozen food grew quite quickly. It was because the restaurants tried their foods with vending machines for supplemental income. I also assume Japan having lots of noodle restaurants made that happen. Noodles do not loose its flavor and chewie feeling even after being frozen and defrosted. I often buy frozen noodle and they are surprisingly good.

Now that the pandemic has been almost ended recently, the many vending machines are likely be left unused after the restaurants recovered their main business. Probably someone found that they could sell the hunted bear meat with that vending machine likely be sold or rented for cheaper prices.

The season and the post-Covid era, these two accidently happened what the news said.

This is just my theory but I am about 70% confident.