hmm... Probably you should think that you can't communicate in English than you think. In a shop and the public facilities, you will not need to worry very much. Anyone enumerates words and will try a conversation hard. However, it will be difficult if you ask a person walking in the town and are going to talk them. If there are Tokyo and Osaka, the person who can speak English is one of 20 people. In other local cities, it will be one of 50 people.
The places that you should go in Tokyo and Osaka are different what you want to do. If there is the general tourist attraction that is unrelated to anime and game, they are as follows.
- Tokyo
Asakusa
Akihabara
Harajuku (Takeshita Street and Omote Sandou)
Meiji Jingu Shrine
Tokyo Tower
Tsukiji Outer Market
Tokyo Disney Resort
Ooedo Onsen Monogatari (Hot spring)
Ghibli Museum, Mitaka
Ryōgoku Kokugikan (Sumo stadium / Sumo museum)
Robot Restaurant
- Yokohama, Kanagawa
Cupnoodles Museum
Shin-Yokohama Ramen Museum
- Osaka
Dotonbori and Shinsai-bashi
Tsutenkaku
Osaka Castle
Osaka Aquarium KAIYUKAN
Universal Studios Japan
Space Station Bar, Osaka
- Kyoto
Fushimi Inari Taisha Shrine
Nijo Castle
Kinkakuji Temple
Kiyomizu dera Temple
Toei Eiga Mura (Toei Kyoto Studio Park)
etc.