This apartment is located in a great location. It's a little hard to find as it's on the 5th floor of a rather non-descript building. The space is well setup with 4 twin beds in the bedroom which is separated from the small living area/kitchen by a sliding door. There is also access to a concrete balcony which looks out over a neighboring cemetery. Not really picturesque but functional for airing laundry etc.
The kitchen area has a sink, hotplate for cooking, microwave and mid-size refrigerator. The only drawback to the kitchen area was the lack of cookware. We basically couldn't cook a meal using the hotplate as there were no pots or pans for cooking. There were also only a few plates, cups and glasses, not really enough for a family of 4. I have experienced this elsewhere in Japanese rental properties though. I'd recommend bringing some plastic cutlery or chopsticks, you can pick these up easily at local convenience stores.
The bathroom is setup with the sink and bath/shower combo wet room separate from the toilet which is actually great for families. There is also a great, full sized, modern front-loading washing machine which was a big plus for us. There are hangers for drying laundry but I also recommend having a portable line with you to dry socks and underwear etc.
The location is close to a Don Quijote, grocery stores, convenience stores and restaurants. It's really very convenient. Also walking distance to major sites like the Peace Park and Museum.