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