We very much enjoyed our time at Tk's house. It is extremely spacious compared to other places we have stayed in the past in Japan. It is clean and recently thoughtfully renovated 3 story stand-alone home. It's great to have a full bathroom and shower on all 3 floors. The kitchen is equiped with everything we needed. The entire house gets great light during the day and the blackout shades work well at night. The neighborhood is very quiet and the beds are comfortable, we found it easy to get a good night sleep. We had way more sleeping options than we needed, but it allowed us each be able to have our own bed which was nice. It really could sleep 19 if you shared the larger beds! If each person wanted their own bed, it could accommodate 10. 4 of the beds can turn into functional couches which we made use of.
The wifi was super fast and there were two backups! This was great for work, I had to rent wifi pucks in the past because of bandwidth throttling. With the house a puck was included so we had high-speed internet all around town. I worked from 12-8am each night and I could have conference calls without waking the children. The kitchen table was Ok as a desk. For breakfast I was going to the 7-11, but I found out towards the end, the Lawson is much better with even more options.
The children enjoyed morning TV in the livingroom which can play YouTube. The staircases were not as steep and had better railings than others we have had, they were easily climbed by our two year old twins who stayed on floor 3. They also enjoyed playing in the bathtub on that floor and the large park with a Zipline that is across the street to the north.
Tk was very helpful with helping us find the right bus to Narita (Kansai Airport Express from Ichinoe, look for Super 7 signs). Our arrival was also very welcoming.
The town of Ojima is quiet which is a good thing for resting and working. The nearby market Street is cute and we got some great things from the local vendors there to eat. The train is stroller accessible and can get you to Shinjuku quick, from there you can branch off to other parts of the city. In our 8 days there we were able to explore many areas. Here is a list from what I can remember in order of our favorite experiences first (keep in mind we are in our late 30s, have two toddlers in a Zoe tandem stroller and needed to be at house around 6pm to sleep) Koenji, Naka-Meguro, Kagurazaka, Shimokitazawa, Oji, Nakano, Shibuya, Daikanyamacho, Sumida, Yanaka, Tokyo Station, Ueno, Roppongi, Shinjuku, Ebisa, Waseda, Akihabara, Jimbocho, Chioda, Harajuku, Takanobaba. You can definitely do Tokyo with toddlers but there is a lot of walking/strolling. Unfortunately some train stations were not stroller accessible, stairs are doable if they can walk. It's mostly a flat city, we were able to walk/stroll 67 miles in our visit. Luckily it was fall the temperature was great and there were only two rainy days. We enjoyed our trip and the house. We will be back!