1998 Japan Open Tennis Championships – Women's singles

First-seeded Ai Sugiyama was the defending champion and won in the final 6–3, 6–3 against Corina Morariu.

Women's singles
1998 Japan Open Tennis Championships
Final
ChampionJapan Ai Sugiyama
Runner-upUnited States Corina Morariu
Score6–3, 6–3
Details
Draw30 (4 Q / 2 WC )
Seeds8
Events
Singles men women
Doubles men women
← 1997 · Japan Open · 1999 →

Seeds

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A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated. The top two seeds received a bye to the second round.

  1.   Ai Sugiyama (champion)
  2.   Naoko Sawamatsu (quarterfinals)
  3.   Tamarine Tanasugarn (second round)
  4.   Amy Frazier (semifinals)
  5.   Corina Morariu (final)
  6.   Shi-Ting Wang (semifinals)
  7.   Miho Saeki (first round)
  8.   Yuka Yoshida (second round)

Draw

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Final

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Final
1   Ai Sugiyama 6 6  
5   Corina Morariu 3 3  

Section 1

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First round Second round Quarterfinals Semifinals
1   A Sugiyama 6 6  
    N Miyagi 6 3 7     S-T Wang 3 2  
    L Osterloh 0 6 6 1   A Sugiyama 4 6 6
Q   S De Beer 4 4       E deLone 6 1 1
    E deLone 6 6       E deLone 6 2 6
    N Kijimuta 1 6 1 8   Y Yoshida 3 6 2
8   Y Yoshida 6 4 6 1   A Sugiyama 6 6  
3   T Tanasugarn 4 7 6 6   S-T Wang 3 2  
    E-H Kim 6 5 0 3   T Tanasugarn 2 3  
    M-R Jeon 4 1       L McNeil 6 6  
    L McNeil 6 6       L McNeil 6 4 1
Q   S Hisamatsu 2 2   6   S-T Wang 4 6 6
    R Hiraki 6 6       R Hiraki 3 2  
WC   S Asagoe 6 3 1 6   S-T Wang 6 6  
6   S-T Wang 3 6 6

Section 2

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First round Second round Quarterfinals Semifinals
7   M Saeki 6 2  
    G Helgeson-Nielsen 7 6       G Helgeson-Nielsen 3 2  
WC   S Obata 5 1       N Pratt 6 6  
    N Pratt 7 6       N Pratt 2 6 2
    K Kunce 7 4 1 4   A Frazier 6 4 6
Q   M Endo 6 6 6 Q   M Endo 0 1  
Q   Y-J Choi 4 2   4   A Frazier 6 6  
4   A Frazier 6 6   4   A Frazier 6 6 4
5   C Morariu 6 6   5   C Morariu 4 7 6
    S-H Park 4 2   5   C Morariu 6 6  
    M Shaughnessy 3 6 6     M Shaughnessy 3 2  
    J Lee 6 2 4 5   C Morariu 7 6  
    H Inoue 6 6   2   N Sawamatsu 5 3  
    S Noorlander 4 1       H Inoue 6 4 6
2   N Sawamatsu 4 6 7
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