Get rid of air bnb and similar. It's caused a ton of problems in Japan as well with people buying whole buildings and pricing out existing tenants. There are legal protections, but most tenants, particularly elderly, don't know about them and either pay new increased prices by the new landlord or move out. The government enacted laws requiring a minpaku (think lodging/hotel) license and putting maxes on time, but tons of people still run illegal ones.

A lot of those people seem to be Chinese investors running them off of other sites which has furthered anger and xenophobia against all foreigners. One of the parties that skyrocketed in the most recent election wants to strip property rights from all foreigners and not just investment properties but ALL properties. It's a reaction to getting priced out and the government not doing shit about it. Granted, there are tons of other problems (prices rising weekly or monthly, wages not keeping up at all with inflation and rising prices, and overtourism more generally), but this is low-hanging fruit.

As someone who just bought a house last year (on the market for over a year in the countryside with farmland for which I had to interview and get permits to buy and use), and volunteers in his community, this is terrifying to me. I had to go through tons of extra hoops just for being a foreigner to begin with and now, thanks to fuckhead illegal hotel owners and bad policy, now lots of people want to take the one little bit of stability I finally felt.