2009 Takayama National Highway Area Tunnel Installation Detailed Corrected Design[MLIT Takayama Office]
Atsumi Tsuruoka Area Tunnel Affiliated Facilities Design[MLIT Sakata Office]
Metropolitan Inter-City Expressway Shiroyama Hachioji Tunnel Detailed Design[MLIT Sobu Office]
No.41 Takayama Kokufu Tunnel Detailed Design[MLIT Takayama Office]