This is one of the few terrible experiences I’ve had in Japan out of the 4 times I’ve visited. Firstly our room had black mould all over the window seals, furthermore the host does not allow you to open any windows (no wonder why there is mould)… The host agreed to move us to another room however his one had the same issue and the bathroom constantly smelled of sewage, after some inspection I diagnosed the issue as a drain filter in the shower that had not been cleaned full of hair and gunk( cleaned it my self). I contacted the host about the issue and requested a partial refund as I deemed it unsafe to stay in a room full of black mould without any ventilation, host decided to ghost me and stopped responding all together. I had no choice but to double book accomodation (not via air bnb). I escalated to air bnb and after being passed around for a week trying to get help I was told I was not covered. Beware of this listing and host, would not recommend