About OKAMOTO KYOSUKE
About 鉄道総合技術研
About OKAMOTO KYOSUKE
About 産業技術総合研
About TSUNO SEIJI
About 鉄道総合技術研
About 鉄道総研報告
About P wave(seismic wave)
About earthquake warning
About railway
About distance
About earth crust
About improvement
About epicentral distance
About early earthquake warning
About high precision
About Seismology in general
About 地震防災
About 耐震
About P波
About 伝播
About 地域性
About 早期地震警報
About 高精度化
About 手法