Targeting production wellsProduction well requires geological investigations that integrate current thermal manifestationsThermal manifestation, recent hydrothermal rock alterationHydrothermal rock alteration, and geomorphological features. The orientation of the regionalStress field stress fieldRegional stress field and the degree of rock consolidationConsolidation through geological time significantly influence the development of permeable fracturesPermeable fracture. The geothermal reservoirGeothermal reservoir in the Hohi region (Kyushu) is primarily composed of volcanic rocks deposited from the Pliocene to the Late Pleistocene. In contrast, the Sengan regionSengan region (in Tohoku district) (Tohoku) comprises both volcanic and sedimentary rocks ranging in age from the pre-Tertiary to the Middle Pleistocene.