I don't run AirBnB but I know people who have and who do very well with them - just putting it out there.

I honestly feel that this will be some other law that will simply be ignored or very selectively enforced. There are tons of hostels that openly flout existing laws, and while the people who rent an apartment and put it on AirBnB might follow these new laws, the people who rented an entire building and run something out of it won't.

Near my apartment there are tons of AirBnBs (and hostels) and I constantly see people with luggage (the train station is a major train station and there is a big bus terminal as well...). I fear that the government has done this, but will kill the golden goose. Even AirBnB users pump a lot of money into the economy, and crappy areas like Osaka's Shin Imamiya have improved quite a bit because of the money pumped in.