The Tuanku Ja'afar Cup was a cricket tournament contested by the national sides of Hong Kong, Malaysia, Singapore and Thailand. It is named in honour of the late Tuanku Jaafar, the former Yang di-Pertuan Besar of Negeri Sembilan and Yang di-Pertuan Agong (King of Malaysia) between 1994 and 1999.
The tournament was first played in 1991, not involving Thailand, to help the other three countries prepare for the ICC Trophy. Thailand joined the competition in the second year, and the four teams played annually until 2004, with Thailand missing in 1998 and 1999, when just three teams played, and 2002, when they were replaced by Hong Kong A. Hong Kong have won the tournament the most times, winning nine of the 14 tournaments played. Malaysia have won four times, whilst Singapore have won just once.
The first Tuanku Ja'afar Cup was played on a league basis with no final. Hong Kong won the tournament, with Singapore as runners-up.
The second Tuanku Ja'afar Cup saw Thailand play for the first time. Hong Kong were again the winners, with Malaysia runners-up this time.
The 1993 Tuanku Ja'afar Cup was the last to be played without a final. Hong Kong won the third consecutive time. Singapore were runners-up.
The 1994 tournament was the first to have a final after the initial league phase. Hong Kong and Singapore topped the table after the group stage, and with Hong Kong unbeaten on home turf and with a 107 run win over Singapore under their belts, they were favourites to lift the cup, but Singapore triumphed in the final by two wickets.
The 1995 tournament was won by Malaysia for the first time. They beat Hong Kong in the final.
The tournament was held in Singapore for the second time in 1996, with Hong Kong beating the hosts by 20 runs in the final. Malaysia finished third and Thailand finished last. The tournament saw some record performances in the match between Hong Kong and Thailand. Hong Kong scored 415/5, the highest team score in the history of the competition. Riaz Farcy scored 178 in that match, the highest individual score in the history of the competition.