1980 Japan Series

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{{Infobox Japan Series

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| country = Japan

| year = 1980

| champion = Hiroshima Toyo Carp (4)

| champion_manager = Takeshi Koba

| champion_games = 73-44-13

| runnerup = Kintetsu Buffaloes (3)

| runnerup_manager = Yukio Nishimoto

| runnerup_games = 68-54-8

| date = October 25 – November 2

| MVP = Jim Lyttle (Hiroshima)

| FSA = Toru Ogawa (Kintetsu)

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The 1980 Japan Series was the 31st edition of Nippon Professional Baseball's postseason championship series. This series was a rematch of the previous year's series, which matched the Central League champion Hiroshima Toyo Carp against the Pacific League champion Kintetsu Buffaloes. The Carp defeated the Buffaloes in seven games to capture their second consecutive Japan Series championship.