If you have booked this hotel, be remembered to get their main door passcode and the room passcode before you go there as they are a self check-in hotel without any staff station there. Unless you are lucky to see their cleaning staff is cleaning there until some one come out and inform you to contact the owner by their instagram for details.
Even I had contacted them through hotels.com that I will be late check-in at 11:30pm and they replied there was no problem, no one was there to check-in for me. I don't understand why they run this hotel by self check-in but they didn't inform me their main door passcode and room no. and password to me before I arrived there or after my reservation. They totally no mindset to inform me the main door passcode or send someone there to check-in for me. I was lucky that there was a guest on the ground floor room not yet slept and I knocked her window for help, and she told me I could contact the owner by instagram of the hotel. The owner apologised this incident was caused by the malfunction of their system which was unacceptable, as they should inform me when I called hotels.com to contact them for late check-in.
Further, their room is super small that is even smaller than Japan budget hotels, only few steps can be walked, no table, no kettle or drinking water is provided. If you still decide to book this hotel, be ensure to have your plan B for a backup hotel when you can't get in.