I loved Enoshima. Enoshima is easily to reach from Tokyo and perfect for a beach day. The beach is really close to the station and a long bridge leads you to the actual Island. It is small, so you can walk the path all over the Island in less then an hour. At the back side there is also a small beach with many rocks where you can take many pictures. Though crowded, the atmosphere on the Island was really nice, with many shops selling delicious fresh seafood and yummy snacks. One tip, if you go in the evening you will find less people, but careful to not miss your train back!
Being very close to Tokyo, its a great one day trip!
I loved the temple and the dragon decorations around it the most! it had a very good impact on me, with a kinda of mysterious kind of vibe!
The island itself is small, what helps to explore it in a day! But be prepared to go up a lot f stairs, and find on the way many adorable trinket shops as well as very Japanese-y food tents and restaurants!
I recommend it as a spring/summer day trip as there is a beach close by and you can enjoy it before going to the Enoshima island!