But if you want to see some nearby places for day trips, there are many good regional passes. Some places are Karuizawa, Kusatsu, Izu, Takao, the Hitachi Seaside Park, Hakone, the Fuji 5 Lakes, Nikko and many more. A Tokyo Wide Pass can be a great help. http://www.japan-guide.com/e/e2361_06.html Or for Kamakura & Enoshima, there is the Enoshima Kamakura Free Pass. https://www.japan-guide.com/e/e2358_003.html
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It depends where you plan to go.
If within Tokyo, a 48 or 72 hour Tokyo subway pass can be a good way to save money.
http://www.tokyometro.jp/en/ticket/value/travel/index.html#anc03
But if you want to see some nearby places for day trips, there are many good regional passes. Some places are Karuizawa, Kusatsu, Izu, Takao, the Hitachi Seaside Park, Hakone, the Fuji 5 Lakes, Nikko and many more.
A Tokyo Wide Pass can be a great help.
http://www.japan-guide.com/e/e2361_06.html
Or for Kamakura & Enoshima, there is the Enoshima Kamakura Free Pass.
https://www.japan-guide.com/e/e2358_003.html