See main article: 1990 Davis Cup.
The Asia/Oceania Zone was one of the three zones of the regional Davis Cup competition in 1990.
In the Asia/Oceania Zone there were two different tiers, called groups, in which teams competed against each other to advance to the upper tier.
Winners in Group I advanced to the World Group qualifying round, along with losing teams from the World Group first round. The winner of the preliminary round joined the remaining teams in the main draw first round, while the losing team was relegated to the Asia/Oceania Zone Group II in 1991.[1]
The winner in Group II advanced to the Asia/Oceania Zone Group I in 1991.