About SAWAMURA SHUJI
About SHIBUYA HAJIME
About 国土交通省 北海道開発局
About fishing port
About Hokkaido
About remains
About civil engineering structure
About breakwater
About concrete block
About historic structure
About concrete block structure
About civil engineering heritage
About 船入澗防波堤
About 函館港
About Civil engineering in general
About Coastal engineering
About 函館
About 歴史
About 土木遺産
About 防波堤