1977 Japan Open Tennis Championships

The 1977 Japan Open was a men's tennis tournament played on hard courts and part of the 1977 Colgate-Palmolive Grand Prix.

Also called the Fred Perry Japan Open it's sponsored name took place in Tokyo, Japan.

The tournament was held from 31 October through 6 November 1977.

First-seeded Manuel Orantes won the singles title.

Manuel Orantes defeated Kim Warwick, 6–2, 6–1 Geoff Masters / Kim Warwick defeated Colin Dibley / Chris Kachel, 6–2, 7–6