2017 Takada District Tunnel Inspection Project[MLIT Takada Office]
2012 Nagano National Highway Office District Tunnel Inspection Project[MLIT Nagano Office
District Tunnel Inspection[MLIT Akita Office]
2009 Ozu District Tunnel Inspection[MLIT Ozu Office]
Kokurobedani Tunnel Inspection and Repair Design[MLIT Kurobe Office]
Gassan First Tunnel Periodic Inspection Design[MLIT Sakata Office]
Yokote Tunnel Repair Design[MLIT Yamagata Office]
North Area District Tunnel Repair Design[MLIT Sendai Office]
Road Tunnel Periodic Inspection[MLIT Yokohama Office]
District Tunnel Repair Study[MLIT Koriyama Office]
District Tunnel Repair Design[MLIT Nagano Office]
Hiraoka, Otomi Tunnel Widening Design[Chiba Prefecture Gov’t]