In the beginning , I'm looking for a safe and convenient place for my trip. After doing some survey by viewing comment in some forum site, I aware of some host in airbnb may not got the license or registration number in local government.
Those hosts just fill a number which I can't recognize in license column. Until I found 〔F3 Iimura-tei Asakusa Tokyo 浅草寺秋叶原PRICE DOWN〕, its' registration number looks like an address string : 東京都台東区台東保健所 | 30台台健生環き第163号 which is different from others.
Just put it in google serach, I get a pdf file here : http://www.city.taito.lg.jp/index/kurashi/jutaku/kankyoeisei/20190331_ryokan.files/310331_ryokan.pdf
The registration number lists in No.361 in page-13 and the pdf file is stored in web site which is Taito City official site. It means this apartment is legal for rent.
The facilities are same as description.
You will feel hot while coming into the Tatami-floored room that are heating by sunlight in summer afternoon. But notice that you can setup air conditioner by remote controller to auto power-on in schedule before you come back. So the hot air inside the room is not a problem.
To summary this apartment is really good for family. Especially in same price level , rooms which are available for over 4 people are rare in normal hotel.
And another good reason is when messaging to host I get soon response because co-hosts will answer you too.