# 1989 Tokyo Indoor – Singles

Boris Becker was the defending champion, but did not participate this year.
Aaron Krickstein won the tournament, beating Carl-Uwe Steeb in the final, 6–2, 6–2.

## Seeds

* Stefan Edberg (semifinals)
* Andre Agassi (second round)
* Jakob Hlasek (second round)
* Aaron Krickstein (champion)
* Carl-Uwe Steeb (final)
* Andrés Gómez (second round)
* Kevin Curren (first round)
* Dan Goldie (second 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 | Semifinals | Final | Final | Final | Final |
| 1 | Stefan Edberg | 6 | 6 | 6 | | | | |
| 4 | Aaron Krickstein | 2 | 7 | 7 | | | | |
| 4 | Aaron Krickstein | 2 | 7 | 7 | 4 | Aaron Krickstein | 6 | 6 |
| | | | | | 5 | Carl-Uwe Steeb | 2 | 2 |
| 5 | Carl-Uwe Steeb | 6 | 6 | | 5 | Carl-Uwe Steeb | 2 | 2 |
| | Darren Cahill | 4 | 4 | | | | | |

### Top half

| First round | 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 | Semifinals |
| 1 | S Edberg | 6 | 6 | | | | | | | | | | | | | | | |
| Q | G Michibata | 1 | 3 | | 1 | S Edberg | 6 | 6 | | | | | | | | | | |
| | T Högstedt | 3 | 2 | | | J Fitzgerald | 2 | 3 | | | | | | | | | | |
| | J Fitzgerald | 6 | 6 | | | | | | | 1 | S Edberg | 6 | 7 | | | | | |
| WC | T Tsuchihashi | 6 | 0 | | | | | | | | H Leconte | 1 | 6 | | | | | |
| | H Leconte | 7 | 6 | | | H Leconte | 4 | 7 | 6 | | | | | | | | | |
| | E Jelen | 4 | 6 | 6 | | E Jelen | 6 | 6 | 4 | | | | | | | | | |
| 7 | K Curren | 6 | 4 | 4 | | | | | | | | | | 1 | S Edberg | 6 | 6 | 6 |
| 4 | A Krickstein | 6 | 6 | 7 | | | | | | | | | | 4 | A Krickstein | 2 | 7 | 7 |
| | S Živojinović | 3 | 7 | 6 | 4 | A Krickstein | 3 | 6 | 6 | | | | | | | | | |
| | J Pugh | 3 | 5 | | Q | B Dyke | 6 | 3 | 4 | | | | | | | | | |
| Q | B Dyke | 6 | 7 | | | | | | | 4 | A Krickstein | 6 | 6 | | | | | |
| | S Davis | 3 | 3 | | | | | | | | G Connell | 3 | 4 | | | | | |
| | G Connell | 6 | 6 | | | G Connell | 2 | 6 | 6 | | | | | | | | | |
| WC | H Tanizawa | 0 | 2 | | 6 | A Gómez | 6 | 1 | 4 | | | | | | | | | |
| 6 | A Gómez | 6 | 6 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | C-U Steeb | 6 | 6 | | | | | | | | | | | | | | | |
| Q | P McEnroe | 4 | 2 | | 5 | C-U Steeb | 6 | 6 | | | | | | | | | | |
| | L Shiras | 6 | 6 | | | L Shiras | 1 | 4 | | | | | | | | | | |
| WC | T Ho | 4 | 2 | | | | | | | 5 | C-U Steeb | 6 | 7 | | | | | |
| | B Drewett | 2 | 7 | 6 | | | | | | Q | R Leach | 4 | 5 | | | | | |
| Q | R Leach | 6 | 6 | 7 | Q | R Leach | 4 | 7 | 6 | | | | | | | | | |
| | R Reneberg | 7 | 3 | 2 | 3 | J Hlasek | 6 | 6 | 4 | | | | | | | | | |
| 3 | J Hlasek | 6 | 6 | 6 | | | | | | | | | | | 5 | C-U Steeb | 6 | 6 |
| 8 | D Goldie | 6 | 6 | | | | | | | | | | | | | D Cahill | 4 | 4 |
| | P Chamberlin | 4 | 4 | | 8 | D Goldie | 6 | 4 | | | | | | | | | | |
| | R Matuszewski | 6 | 6 | 2 | | D Cahill | 7 | 6 | | | | | | | | | | |
| | D Cahill | 7 | 3 | 6 | | | | | | | D Cahill | 3 | 7 | 6 | | | | |
| | S Matsuoka | 7 | 2 | 5 | | | | | | | R Agénor | 6 | 6 | 4 | | | | |
| | R Agénor | 6 | 6 | 7 | | R Agénor | 6 | 6 | | | | | | | | | | |
| | W Masur | 3 | 4 | | 2 | A Agassi | 0 | 3 | | | | | | | | | | |
| 2 | A Agassi | 6 | 6 | | | | | | | | | | | | | | | |