Tomitarō Horii (堀井 富太郎, Horii Tomitarō, November 7, 1890 – November 23, 1942) was a lieutenant general in the Imperial Japanese Army during World War II. After graduating from the Imperial Japanese Army Academy in 1911, Horii served in China before undertaking a variety of regimental appointments. Following Japan's entry into World War II, he commanded a division during the capture of Guam before commanding the Japanese force that had been given the task of capturing Port Moresby. In November 1942, in the retreat from Oivi–Gorari, Horii drowned while attempting to canoe down the Kumusi River to reach Japanese forces defending Buna–Gona. His canoe was swept out to sea and capsized.