The Motofuji calvert, located in Fuji Coast (Fuji City, Shizuoka Prefecture), experienced problems with the clogging of its outlets due to coastal drift and high waves. In response to them, hydraulic model experiments were conducted for several years starting from fiscal year 2016, and an unprecedented construction method of " relocation of a jetty and excavation behind calvert outlets " was selected as the optimal solution. After the completion of the construction on-site by fiscal year 2020, simple measurements and photographic documentation using UAVs have been performed to monitor sedimentation at the outlets, refilling of the excavated areas, and changes in berms formed by high waves. The results show that a berm height of T.P.+2.5m could serve as one of the benchmarks for implementing re-excavation behind the calvert outlets.