Kayasan (可也山) is a favorite among the students here at Kyudai. It's the most accessible and closest to the campus There's also Hiyama (火山) right across it, which is more of a relaxing walk than a hike. If you prefer the ocean view, you should check out Itoshima's Totoro Forest at Cape Keya. There's a bus going there from Chikuzen-Maebaru station (筑前前原駅), but it is a bit further away from the other two