Masami Kobayashi (???, Kobayashi Masami or Kobayashi Masashi, 18 June 1890 – 7 August 1977) was an admiral in the Imperial Japanese Navy during World War II.
His name was sometimes misspelled as "Marasmi Kobayashi" or "Marashi Kobayashi" by contemporary United States Navy sources.
He was an outspoken proponent of the Treaty Faction within the Imperial Japanese Navy.