国土交通省
The twenty-three major seaports designated as special, important ports by the Ministry of Land, Infrastructure, Transport and Tourism : Chiba, Fushiki/Toyama, Himeji, Hiroshima, Kawasaki, Kitakyūshū, Kobe, Kudamatsu, Muroran, Nagoya, Niigata, Osaka, Sakai/Senpoku, Sendai/Shiogama, Shimizu, Shimonoseki, Tokyo, Tomakomai, Wakayama, Yokkaichi, and Yokohama.