The Seismological Society of Japan (日本地震学会, Nihon jishin Gakkai) or SSJ is a learned society (professional association) with the goal of advancing the understanding of earthquakes and other seismic phenomena.

John Milne joined James Alfred Ewing, Thomas Lomar Gray[1] and Thomas Corwin Mendenhall[2] in founding the Seismological Society in 1880.

[3] These men were teaching at the Imperial College of Tokyo (now called the University of Tokyo)[1] and were foreign advisors to the government in Meiji period Japan (o-yatoi gaikokujin).

[5] The organization publishes the Journal of the Seismological Society of Japan (地震, Jishin) abbreviated at "J Seismol Soc Jpn".

[6] The SSJ also sponsors the journal Earth, Planets and Space.