See all Attractions in Koyasan Koyasan for: Adventure, Food And Dining, Art And Culture, Nightlife, Spa, History, First Timers, Family, Romance, Shopping Oku-no-In About To the east of town is Oku-no-In (奥の院), the mausoleum of Kukai, lit by thousands of lanterns. According to tradition, the lights have been lit since Kukai's death over 1000 years ago. Add to Wish List