See main article: 1978 Davis Cup.
The Eastern Zone was one of the three regional zones of the 1978 Davis Cup.
11 teams entered the Eastern Zone, with 7 teams competing in the preliminary round to join the previous year's semifinalists in the main draw. India and Indonesia received byes into the quarterfinals, while Australia and New Zealand received byes into the semifinals. The winner of the main draw went on to compete in the Inter-Zonal Zone against the winners of the Americas Zone and Europe Zone.[1]
Australia defeated New Zealand in the final and progressed to the Inter-Zonal Zone.
Philippines vs. Thailand
Japan vs. Chinese Taipei
Pakistan vs. Malaysia
Philippines vs. Japan
South Korea vs. Pakistan
Japan vs. Indonesia
India vs. South Korea
Japan vs. Australia
India vs. New Zealand
Australia vs. New Zealand