| Men's doubles | |
|---|---|
| 1998 Japan Open Tennis Championships | |
| Champions |  Sébastien Lareau Daniel Nestor [1] |
| Runners-up |  Olivier Delaître  Stefano Pescosolido |
| Final score | 6–3, 6–4 |
The 1998 Japan Open Tennis Championships was a tennis tournament played on outdoor hard courts at the Ariake Coliseum in Tokyo in Japan that was part of the International Series Gold of the 1998 ATP Tour and of Tier III of the 1998 WTA Tour. The tournament was held from April 13 through April 19, 1998.
Champion seeds are indicated in bold text while text in italics indicates the round in which those seeds were eliminated.
Alex O'Brien / Jonathan Stark (semifinals) Sébastien Lareau / Daniel Nestor (champions)
Byron Black / 
Patrick Rafter (quarterfinals) Brian MacPhie / Sandon Stolle (quarterfinals) Michael Tebbutt / 
Mikael Tillström (first round) Peter Nyborg / 
David Prinosil (semifinals) Kent Kinnear / 
Chris Wilkinson (first round)| Semifinals | Final [1] | ||||||||||||
| 7 | Peter Nyborg David Prinosil | 3 | 7 | 1 | |||||||||
| 3 | Sébastien Lareau Daniel Nestor | 6 | 6 | 6 | |||||||||
| 3 | Sébastien Lareau Daniel Nestor | 6 | 6 | ||||||||||
| Olivier Delaître Stefano Pescosolido | 3 | 4 | |||||||||||
| Olivier Delaître Stefano Pescosolido | 6 | 7 | |||||||||||
| 2 | Alex O'Brien Jonathan Stark | 4 | 5 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
J Holmes  B Martínez | 7 | 2 | 2 | ||||||||||||||||||||||||
| J Holmes B Martínez | 6 | 6 |  M Damm D Vacek | 6 | 6 | 6 | |||||||||||||||||||||
 H Ishii D Sapsford | 4 | 3 | M Damm D Vacek | 4 | 5 | ||||||||||||||||||||||
| S Iwabuchi M Takada | 7 | 6 | 7 | P Nyborg D Prinosil | 6 | 7 | |||||||||||||||||||||
| B Ellwood G Motomura | 6 | 2 | S Iwabuchi M Takada | 4 | 4 | ||||||||||||||||||||||
| 7 | P Nyborg D Prinosil | 6 | 7 | 7 | P Nyborg D Prinosil | 6 | 6 | ||||||||||||||||||||
 C Haggard P Rosner | 3 | 5 | 7 | P Nyborg D Prinosil | 3 | 7 | 1 | ||||||||||||||||||||
| 3 | S Lareau D Nestor | 6 | 6 | 6 | |||||||||||||||||||||||
 A Pavel L-A Wahlgren | 2r | ||||||||||||||||||||||||||
| A Pavel L-A Wahlgren | 6 | 6 | 6 | 3 | S Lareau D Nestor | 4 | |||||||||||||||||||||
| G Pozzi T Suzuki | 7 | 3 | 2 | 3 | S Lareau D Nestor | 6 | 6 | ||||||||||||||||||||
| D DiLucia M Sell | 6 | 6 | 5 | B MacPhie S Stolle | 4 | 0 | |||||||||||||||||||||
| S Campbell M Joyce | 1 | 2 | D DiLucia M Sell | 6 | 6 | 5 | |||||||||||||||||||||
| 5 | B MacPhie S Stolle | 7 | 7 | 5 | B MacPhie S Stolle | 3 | 7 | 7 | |||||||||||||||||||
 Ó Burrieza R Vašek | 5 | 5 | |||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| O Delaître S Pescosolido | 6 | 6 | 7 | ||||||||||||||||||||||||
| 6 | M Tebbutt M Tillström | 7 | 3 | 6 | O Delaître S Pescosolido | 3 | 6 | 6 | |||||||||||||||||||
| A Clément J Golmard | 6 | 6 | A Clément J Golmard | 6 | 3 | 4 | |||||||||||||||||||||
| Y Ishii H Sato | 4 | 3 | O Delaître S Pescosolido | 6 | 3 | 6 | |||||||||||||||||||||
N Godwin  T Ketola | 5 | 6 | 6 | 4 | B Black P Rafter | 4 | 6 | 4 | |||||||||||||||||||
| F Bergh T Johansson | 7 | 3 | 4 | N Godwin T Ketola | 6 | 4 | |||||||||||||||||||||
| 4 | B Black P Rafter | 7 | 6 | ||||||||||||||||||||||||
| O Delaître S Pescosolido | 6 | 7 | |||||||||||||||||||||||||
| V Santopadre V Spadea | 7 | 6 | 2 | A O'Brien J Stark | 4 | 5 | |||||||||||||||||||||
| 8 | K Kinnear C Wilkinson | 6 | 2 | V Santopadre V Spadea | 7 | 6 | |||||||||||||||||||||
| T Chaen R Tsujino | 3 | 6 | 6 | T Chaen R Tsujino | 5 | 4 | |||||||||||||||||||||
| M Keil T. J. Middleton | 6 | 3 | 4 | V Santopadre V Spadea | 4 | 0 | |||||||||||||||||||||
| S Davis A Richardson | 7 | 6 | 7 | 2 | A O'Brien J Stark | 6 | 6 | ||||||||||||||||||||
| S Matsuoka M Onoda | 6 | 7 | 6 | S Davis A Richardson | 5 | 1 | |||||||||||||||||||||
| 2 | A O'Brien J Stark | 7 | 6 | ||||||||||||||||||||||||
The 1998 Sydney International was a tennis tournament played on outdoor hard courts at the NSW Tennis Centre in Sydney, Australia that was part of the International Series of the 1998 ATP Tour and of Tier II of the 1998 WTA Tour. The tournament was held from 11 through 17 January 1998.
The 1998 European Community Championships was a men's tennis tournament played on hard courts in Antwerp, Belgium, that was part of the Championship Series of the 1998 ATP Tour. It was the sixteenth edition of the tournament and was held 16–22 February 1998.
The 1998 Salem Open was a men's tennis tournament played on Hard courts in Hong Kong that was part of the International Series of the 1998 ATP Tour. It was the 23rd edition of the tournament and was held from 6–12 April 1998.
The 1998 Torneo Godó was a men's tennis tournament played on Clay in Barcelona, Spain that was part of the International Series Gold of the 1998 ATP Tour. It was the 46th edition of the tournament and was held from 13–19 April 1998.
The 1998 Japan Open Tennis Championships was a tennis tournament played on outdoor hard courts at the Ariake Coliseum in Tokyo in Japan that was part of the International Series Gold of the 1998 ATP Tour and of Tier III of the 1998 WTA Tour. The tournament was held from April 13 through April 19, 1998.
The 1998 International Raiffeisen Grand Prix was a men's tennis tournament played on Clay in St. Pölten, Austria that was part of the International Series of the 1998 ATP Tour. It was the eighteenth edition of the tournament and was held from 18–24 May 1998.
The 1998 Internazionali di Carisbo was a men's tennis tournament played on Clay in Bologna, Italy that was part of the International Series of the 1998 ATP Tour. It was the fourteenth edition of the tournament and was held from 8–14 June 1998.
The 1998 Rado Open was a men's tennis tournament played on Clay in Gstaad, Switzerland that was part of the International Series of the 1998 ATP Tour. It was the thirty-first edition of the tournament and was held from 6 July – 12 July 1998. This tournament is notable for being the first professional appearance of 20-time Grand Slam champion Roger Federer.
The 1998 Swedish Open was a men's tennis tournament played on Clay in Båstad, Sweden that was part of the International Series of the 1998 ATP Tour. It was the fifty-first edition of the tournament and was held from 6–12 July 1998.
The 1998 Mercedes Cup was a men's tennis tournament played on clay courts in Stuttgart, Germany, that was part of the International Series Gold of the 1998 ATP Tour. It was the fiftieth edition of the tournament and was held 20 July – 26 July.
The 1998 Mercedes Cup was a men's tennis tournament played on Clay in Stuttgart, Germany, that was part of the International Series Gold of the 1998 ATP Tour. It was the fiftieth edition of the tournament and was held 20 July – 26 July.
The 1998 Legg Mason Tennis Classic was a men's tennis tournament played on outdoor hard courts in Washington, D.C., United States, that was part of the International Series Gold of the 1998 ATP Tour. It was the twenty-ninth edition of the tournament and was held 20 July – 26 July.
The 1998 Croatia Open Umag was a tennis tournament played on outdoor clay courts in Umag, Croatia that was part of the International Series of the 1998 ATP Tour. The tournament was held from July 27 through August 2, 1998.
The 1998 Campionati Internazionali di San Marino was a men's tennis tournament played on Clay in City of San Marino, San Marino that was part of the International Series of the 1998 ATP Tour. It was the tenth edition of the tournament and was held from 10 to 16 August 1998.
The 1998 RCA Championships was a tennis tournament played on outdoor hard courts. It was the 11th edition of the event known that year as the RCA Championships, and was part of the Championship Series of the 1998 ATP Tour. It was the 11th edition of the tournament and took place at the Indianapolis Tennis Center in Indianapolis, Indiana, United States.
The 1998 Pilot Pen International was a tennis tournament played on outdoor hard courts at the Cullman-Heyman Tennis Center in New Haven, Connecticut, in the United States that was part of the International Series Gold of the 1998 ATP Tour and of Tier II of the 1998 WTA Tour. The men's tournament was held from August 17 through August 23, 1998, while the women's tournament was held from August 24 through August 30, 1998.
The 1998 Pilot Pen International was a tennis tournament played on outdoor hard courts at the Cullman-Heyman Tennis Center in New Haven, Connecticut, in the United States that was part of the International Series Gold of the 1998 ATP Tour and of Tier II of the 1998 WTA Tour. The men's tournament was held from August 17 through August 23, 1998, while the women's tournament was held from August 24 through August 30, 1998.
The 1998 Shanghai Open was a men's tennis tournament played on Indoor Carpet in Shanghai, China that was part of the International Series of the 1998 ATP Tour. It was the third edition of the tournament and was held from 5 October – 12 October.
The 1999 Japan Open Tennis Championships was a tennis tournament played on outdoor hard courts at the Ariake Coliseum in Tokyo, Japan that was part of the International Series Gold of the 1999 ATP Tour. The tournament was held from April 12 through April 18, 1999.
The 1999 Japan Open Tennis Championships was a tennis tournament played on outdoor hard courts at the Ariake Coliseum in Tokyo, Japan that was part of the International Series Gold of the 1999 ATP Tour. The tournament was held from April 12 through April 18, 1999.