# 1984 Tokyo Indoor – Singles

Ivan Lendl was the defending champion.
Jimmy Connors won the tournament, beating Lendl in the final, 6–4, 3–6, 6–0.

## Seeds

* Jimmy Connors (champion)
* Ivan Lendl (final)
* Mats Wilander (quarterfinals)
* Andrés Gómez (semifinals)
* Anders Järryd (first round)
* Tomáš Šmíd (first round)
* Scott Davis (first round)
* Brad Gilbert (first round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Jimmy Connors | 6 | 6 | | | | | |
| 4 | Andrés Gómez | 3 | 2 | | | | | |
| 4 | Andrés Gómez | 3 | 2 | 1 | Jimmy Connors | 6 | 3 | 6 |
| | | | | 2 | Ivan Lendl | 4 | 6 | 0 |
| | Ramesh Krishnan | 2 | 4 | 2 | Ivan Lendl | 4 | 6 | 0 |
| 2 | Ivan Lendl | 6 | 6 | | | | | |

### Top half

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | J Connors | 6 | 6 | | | | | | | | | | | | | |
| | T Moor | 2 | 4 | 1 | J Connors | 6 | 6 | | | | | | | | | |
| | B Green | 6 | 6 | | B Green | 4 | 2 | | | | | | | | | |
| | S Shiraishi | 2 | 4 | | | | | | 1 | J Connors | 6 | 7 | | | | |
| | Ti Gullikson | 4 | 1 | | | | | | | M Dickson | 4 | 5 | | | | |
| | M Dickson | 6 | 6 | | M Dickson | 2 | 6 | 6 | | | | | | | | |
| Q | G Michibata | 6 | 6 | Q | G Michibata | 6 | 3 | 2 | | | | | | | | |
| 5 | A Järryd | 4 | 2 | | | | | | | | | | 1 | J Connors | 6 | 6 |
| 4 | A Gómez | 7 | 6 | | | | | | | | | | 4 | A Gómez | 3 | 2 |
| | G Holmes | 6 | 2 | 4 | A Gómez | 6 | 6 | 7 | | | | | | | | |
| | T Fukui | 6 | 1 | | To Gullikson | 3 | 7 | 5 | | | | | | | | |
| | To Gullikson | 7 | 6 | | | | | | 4 | A Gómez | 6 | 6 | | | | |
| | E Korita | 6 | 7 | | | | | | | E Korita | 3 | 2 | | | | |
| | N Odizor | 4 | 5 | | E Korita | 6 | 7 | | | | | | | | | |
| | B Scanlon | 6 | 6 | | B Scanlon | 3 | 6 | | | | | | | | | |
| 8 | B Gilbert | 4 | 1 | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | T Šmíd | 6 | 4 | 2 | | | | | | | | | | | | | |
| | R Krishnan | 2 | 6 | 6 | | R Krishnan | 6 | 6 | | | | | | | | | |
| Q | D Gitlin | 6 | 1 | 1 | | Z Kuhárszky | 0 | 4 | | | | | | | | | |
| | Z Kuhárszky | 4 | 6 | 6 | | | | | | R Krishnan | 5 | 6 | 7 | | | | |
| Q | F González | 1 | 6 | 5 | | | | | 3 | M Wilander | 7 | 4 | 6 | | | | |
| | B Testerman | 6 | 3 | 7 | | B Testerman | 3 | 2 | | | | | | | | | |
| | J Sadri | 6 | 4 | | 3 | M Wilander | 6 | 6 | | | | | | | | | |
| 3 | M Wilander | 7 | 6 | | | | | | | | | | | | R Krishnan | 2 | 4 |
| 7 | S Davis | 7 | 3 | 6 | | | | | | | | | | 2 | I Lendl | 6 | 6 |
| | M Davis | 5 | 6 | 7 | | M Davis | 3 | 0 | | | | | | | | | |
| | A Amritraj | 6 | 6 | | | A Amritraj | 6 | 6 | | | | | | | | | |
| | L Shiras | 3 | 0 | | | | | | | A Amritraj | 4 | 4 | | | | | |
| Q | M Anger | 6 | 7 | | | | | | 2 | I Lendl | 6 | 6 | | | | | |
| | J Fitzgerald | 4 | 6 | | Q | M Anger | 0 | 2 | | | | | | | | | |
| | S Giammalva Jr. | 4 | 1 | | 2 | I Lendl | 6 | 6 | | | | | | | | | |
| 2 | I Lendl | 6 | 6 | | | | | | | | | | | | | | |