Kouji Kawaguchi (川口浩二 Kawaguchi Kōji; April 8, 1869-September 4, 1964) was a fourteenth and last president of New Japan, which he served from 1910 to his resignation following an New Japanese defeat in the New Edo War in 1914. He then later served as president of the Kadsreius Sentanese Republic from 1941 to 1946, whilst Hiroshi Kayos was at the United States.