There are three options if you’re heading directly back to central Tokyo from Enoshima. The most straightforward is the Odakyū-Enoshima line direct to Shinjuku, though note that weekday services are few and far between. The trains depart from Katase-Enoshima Station (片瀬江ノ島駅); from the island causeway, turn left across the river to find the station with its distinctive Chinese-style facade. A pleasant alternative is to take the Shōnan monorail to Ōfuna, on the main JR lines to central Tokyo via Yokohama; Shōnan-Enoshima Station (湘南江ノ島駅) is located just north of the Enoden line station. The last option is to hop on the Enoden line west to its terminal in Fujisawa, where you have to change stations for JR services to central Tokyo.