About YAMAMOTO SHUNROKU
About 鉄道総合技術研
About SATO SHINJI
About 鉄道総合技術研
About disaster countermeasure
About disaster prevention
About system
About distance
About magnitude
About earthquake disaster prevention
About early seismic warning system
About epicentral distance
About earthquake magnitude
About Natural disasters
About 鉄道
About 研究
About 開発
About 早期地震警報システム