| Daiji Morii | |
| Birth Date: | 4 August 1967 |
| Highestsinglesranking: | No. 446 (29 Nov 1993) |
| Australianopenresult: | Q1 (1993, 1995) |
| Wimbledonresult: | Q1 (1994) |
| Doublesrecord: | 0–1 |
| Highestdoublesranking: | No. 738 (9 Aug 1993) |
Daiji Morii (born 4 August 1967) is a Japanese former professional tennis player.
Morii reached a best singles ranking of 446 on the professional tour, which included a qualifying draw appearance at the Wimbledon Championships.[1] He was a singles quarter-finalist at the Réunion Island Challenger in 1993, with wins over Éric Winogradsky and Mark Kaplan. His only ATP Tour main draw came in doubles at the 1996 Japan Open.[2]