Terry Moor was the defending champion, but lost in the quarterfinals to Mel Purcell.

Ivan Lendl won the title, defeating Eliot Teltscher in the final, 3–6, 6–4, 6–0.

Seeds

Draw

Finals

Top half Section 1

Section 2

Bottom half Section 3

Section 4

References

External links 1980 Japan Open men's singles draw