This warm abode of Oshima is a delightful place to visit in Japan. When planning a trip to Oshima, make sure you visit its near-by prime city of Tokyo. So, ideally any vacation planner would recommend you to visit Tokyo for its bountiful attractions like Meiji Jingu Shrine, Ueno Park, Roppongi on your trip to Oshima. To explore Oshima, set aside 1 to 2 number of your days. You'll be coming back for more!
Yes,it is that simple really! Enjoy your trip! Keep travelling!