I've stayed at 50+ Airbnbs all over the world, and this was overall not a great experience, would be in the bottom 5 stays and I would not recommend it.
Long story short, we arrived in Tokyo at 11PM, and the host was notified of that. The pin lockbox that was provided as wrong. We contacted host via call and messages without responses so by the time it was 12:30PM we had to go find a hotel and push 6 suitcases around a very dead area of Tokyo in the cold. It was the worst check-in experience I've ever had.
I contacted Airbnb and Airbnb was kind enough to help work with the host to initiate a refund for one night's stay, however the damage was done, and I was also overall annoyed that they didn't offer it right away.
Besides the check-in and slow communication from the host over the first few days, my main feeling about the accommodation is as follows:
1. Location is in a very dead area overall. It's very far from many of the big things such as Shinjuku, Harajuku, Shibuya. If I had to do it again, I'd definitely not stay here due to location alone.
2. Sound. If you plan to wake up after around 830AM, then definitely this isn't a good place to stay. It's next to a school (literally next door) and tennis courts. That means that kids are constantly yelling and playing tennis and it sounds like they're right next to your bed. I was woken up every single morning and I'm a very heavy sleeper.
3. Host. Overall I did not have a good experience with this host. They're obvious new and inexperienced, but customer service is not their priority. The priority seems to be more like trying to nickle and dime you on everything. For example, late checkout is offered, but an extra $10/hour. There are signs everywhere saying if you do this, we'll charge you this amount, etc. It just felt like I was staying with Wizz Airlines or a budget airlines.
4. Cost/Value. Simply it isn't worth the cost for the hassle, etc.
Sorry, but I don't recommend this stay.