• Nice to meet you. よろしくお願い致します。


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  • About the new coronavirus 新型コロナウイルス感染症に関して


    For information related to the new coronavirus, see below.
    Oita Prefecture Website


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  • Oka Castle Ruins 岡城跡


    Standing atop a steep landform created by large volcanic eruptions from Mt. Aso, Oka Castle Ruins cover an area measuring 1,000,000 square meters.

    The structure looks like a fortress. While the buildings no longer remain, the stone walls are a major attraction.

    Enjoy the beauty of stone masonry combining stones of various shapes by the most skilled craftsmen in Japan at that time. With its unique beauty scattered over the area, the landscape evokes the solemnity of the castle tower in the old days.

    Take an enjoyable stroll around the ruins surrounded by the seasonal beauty of nature. It takes a minimum of 30 minutes to complete the round trip from the parking area, to Ote-mon Gate, and to the Main Enclosure where the castle tower was built. There’s no better way to relax than touring the ruins while enjoying the landscape. The observation spots offer panoramic views of Mt. Aso and the Kuju Mountain Range. When tired from walking, you can take a rest at a free rest house in the grounds.





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