Sugaai Tunnel, Kinki Expressway
2008 / Mie / Civil engineering
Hirouchi, Hokkaido Odan Expressway
2007 / Hokkaido / Civil engineering
Kamishinano, Tokai-Kanjo Expressway
2005 / Aichi / Civil engineering
Shirakawa-go Interchange, Tokai-Hokuriku Expressway
2002 / Gifu / Civil engineering