I happened to dig out this question and realised for the first time that you had additional questions.
"I have been told that I may need to pay the residents gmoving expensesh? What is that about?"
When a resident needs to move away, they need some extra money for new housing and moving equipments, right? If they're being moved away against their contract or against their wish, someone may need to pay some money and say, "Hey, I'm gonna give you this much, so do as I say. Deal?" But I recall you writing that you had already donated the property to the municipal, implying that the property is no longer yours. In that case, I see no reason you, who are not related to the property any more, need to pay anything. But then I'm a total amateur.
"Since it has always been a verbal rental agreement, should I have one written?"
In the end, something has to be written if it's still your property. I suppose you can have an agent write it for you, but that may require some extra work and fee.
"I like your idea about contacting the media...Is there a particular media group that you recommend?"
Major nation-wide newspapers are Asahi Shinbun, Yomiuri Shinbun, Mainichi Shinbun.http://www.asahi.com/english/http://www.yomiuri.co.jp/dy/http://mdn.mainichi.jp/
In fact, on the Dec 25 Japanese evening version of Asahi there was an article on professional land cons of Tokyo which was the very reason I decided to dig your question out again. Looking back at this thread, your may be a slightly different issue, since you're dealing with people who actually lived there. But just to tell you that this paper is concerned.
means "lawyer" (which is what you need now)
means "judicial scrivener" (which is better to have when you write official papers concerning your property)
You have this already explained on another thread.