Investigation of Religious Monuments and Historical Resources Related to the 1662 Hyuganada Earthquake

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  • 1662年日向灘地震における供養碑及び歴史的資産に関する研究

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In the 1662 Hyuganada earthquake (M7.6), a tsunami with height of about 5m attacked a village in southern Miyazaki-city. The tsunami caused devastating damage to the area, killing about 20 people. As the village submerged by the tsunami is Tontokoro, this earthquake is also called the Tontokoro earthquake. This paper describes why subduction occurs during inter-plate earthquake events. After the occurrence of the earthquake, stone monuments have been built in Tontokoro village every 50 years to remember the damage caused by the earthquake. However, it is difficult to decipher the inscription on the stone monuments because the severe weathering they have suffered, we applied the 3D model creation technology using SfM (Structure from motion) to try to read the inscription of the 3D technology. In addition, teaching from the Tang Dynasty of China, which is the origin of Shinran (the founder of Jodo Shinshu Sect), was included in epitaph on the stone monument in Tontokoro village. Dating back to the teachings of Shinran, we tried to interpret the contents of the inscription to pay respect to the casualties. Furthermore, the interpretation of ancient maps and documents is given in various literatures, but we reexamined it and explored new knowledge.

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