> tourists often are very visible and tend to make a bad impression, as most haven't studied the language or learned the numerous behaviour expectations
Tourists are short-term visitors who are there exclusively to spend their money in Japan and leave it with its citizens. If the Japanese do not want that because the tourists don't come fully prepared for living in Japan, then you should just deny tourist entries to the country. It would be win-win for everyone, because there are plenty of other countries who would gladly take those tourists instead.
I'm sure the Sanseito party would be happy to add your proposal to their platform. I doubt the people who work in the tourism industry are voting for them anyway, and the people who benefit indirectly from tourism probably aren't aware enough of the dependency to care about it.
Tourists are short-term visitors who are there exclusively to spend their money in Japan and leave it with its citizens. If the Japanese do not want that because the tourists don't come fully prepared for living in Japan, then you should just deny tourist entries to the country. It would be win-win for everyone, because there are plenty of other countries who would gladly take those tourists instead.