If you are not interested in facilities like pools and fitness centers, but just want a reasonable, convenient room, try the Hotel Rose Garden Shinjuku. This boutique hotel was established in 1997, and has clean, modern facilities and a polite and helpful staff. They welcome visitors of all ages and have several barrier-free rooms and family rooms.
The 100 rooms are smaller than a standard western hotel, but beds and sitting areas are well arranged and tastefully decorated to be comfortable. They all have private bathrooms and are insulated to keep out noise. There are two restaurants, one featuring Italian food called CIAO and one Japanese called KURIKICHI, plus one cafe open for lunch called Garden Restaurant Coffret D’or.
Though not large, the appeal of this hotel is in the convenient location and attention to detail. For example, there is a scale at the front desk so you can weigh your luggage. These thoughtful touches and a welcoming attitude towards children make this a good choice for a family on a short visit to Tokyo. For more information about the Hotel Rose Garden Shinjuku: http://www.hotel-rosegarden.jp/english.html
Booking.com has some excellent rates at Hotel Rose Garden Shinjuku at the following link: http://www.booking.com/hotel/jp/rose-garden-shinjuku.en-us.html?aid=370277
Some of the nearby destinations include: