We had an awesome stay at Hiroki's! He provides very clear instructions for check in and check out. We were able to add on parking and he provided a second set of instructions on this too.
He is not exaggerating about the noise level from the street outside the building so be prepared for that if you stay here. There is a jalousie window so sound really carries. The location is absolutely wonderful though - coffee shops, convenience stores, bus stops, etc. are all very close to the apartment location. The door has an auto lock feature on it so it ensures you don't forget to lock up after a long and exhausting day of exploring and swimming.
There wasn't a coffee press in the room so be sure to plan on bringing that or a moka pot if you need java to get going in the mornings. There was a kettle for tea.
Like others said, bring a wash cloth. If it's not listed in the description, it's not there! The hot water and the shower pressure were AMAZING!
The kitchen had some nice basics but you do need to also get salt/pepper/oil - be sure pack some basics for the kitchen space if you plan to use it! We enjoyed our time here and would stay again!