Yakushima is one of Japan 's most southerly islands and a UNESCO World Heritage Site . Abundant flora is the main attraction ; some of the largest trees are thousands of years old . Despite a sub - tropical climate , the island 's climate can be snow ##y in winter .
Yakushima is one of Japan 's most southerly islands and a UNESCO World Heritage site . Abundant flora is the main attraction ; some of the cedar trees are thousands of years old . Despite a sub-tropical climate , the island 's mountains can be snow capped in winter .