About TEZUKA KEIKO
About 京都学園大学人文学部
About 水資源・環境研究(Web)
About river
About waterborne transportation
About raft
About ship
About ship handling
About habit
About history
About inland waterway
About waterborne traffic
About civil engineering work
About Katuragawa River
About 川作
About Waterborne transportation and service,etc.
About River construction work
About 桂川
About 水運
About 筏
About 船
About 操船
About 川