I don't specifically know how they rent rooms in Mushin, but this request may carry more liability than a one time rental payment. If someone rents the room, will they not be responsible for anything that happens to the room. If there is damage, is the person that signs the rental agreement not liable or will there not be a lease agreement?

I will probably be lambasted for saying this, but what of Uncle Corona? Your risk tolerance must be very high o! If I was you, I will up my budget and go to Seychelles and stay at an all inclusive property where you can relax and isolate yourself in relative luxury.