About YAMAMOTO TETSURO
About OHARA SUKEO
About NISHIMURA YUJIRO
About SHIMA HIROSHI
About TAKAMOTO NAOKUNI
About SEHARA YOICHI
About 常盤地下工業
About cut slope
About disaster prevention countermeasure
About Slope stability,deformation by excavating
About 山口
About 三郡変成帯
About 切土斜面
About 豪雨
About 崩壊