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A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
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| Gifu $50,000 Carpet | May 6 2007 |
| Qual 1 | Ayana Tajima - Oka(1) | 6-1 6-0 |
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| Fukuoka $50,000 Carpet | May 13 2007 |
| 1 | Junri Namigata(8) - Oka | 6-3 6-1 |
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| Nagano $25,000 Carpet | May 27 2007 |
| 1 | Oka - Marina Takimura | 5-7 6-1 6-3 |
| 2 | Oka - Tori Kinard | 6-2 4-6 6-1 |
| QF | Natsumi Hamamura - Oka | 7-66 7-63 |
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| Gunma $25,000 Carpet | Jun 3 2007 |
| Qual 1 | Oka(7) - Asako Sato | 6-0 6-2 |
| Qual 2 | Yurina Koshino(15) - Oka(7) | 6-4 6-3 |
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| Tokyo $10,000 Hard | Jun 10 2007 |
| 1 | Oka(8) - Lucia Gonzalez | 6-2 6-2 |
| 2 | Oka(8) - Tori Kinard | 6-2 6-3 |
| QF | Mari Tanaka(4) - Oka(8) | 2-6 6-4 6-2 |
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| Noto $25,000 Carpet | Jul 1 2007 |
| Qual 1 | Yuko Kurata - Oka(8) | 7-5 4-6 6-4 |
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| Nagoya $25,000 Hard | Jul 8 2007 |
| 1 | Oka - Shan-Shan Song | 6-4 6-1 |
| 2 | Shuai Zhang(1) - Oka | 6-2 6-0 |
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| Miyazaki $25,000 Carpet | Jul 15 2007 |
| Qual 1 | Kyung-Mi Chang - Oka(11) | 3-6 6-3 7-63 |
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| Kurume $25,000 Carpet | Jul 22 2007 |
| Qual 1 | Oka(10) - Yumi Miyazaki | 2-6 7-5 6-3 |
| Qual 2 | Ayaka Maekawa(5) - Oka(10) | 6-71 6-3 6-3 |
| 1 | Oka - Akari Inoue | 6-1 6-1 |
| 2 | Shuai Zhang(3) - Oka | 6-2 6-4 |
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| Obihiro $25,000 Carpet | Aug 5 2007 |
| 1 | Yurika Sema(4) - Oka | 7-5 6-0 |
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| Tokyo $10,000 Carpet | Aug 19 2007 |
| 1 | Oka(7) - Kasumi Aiko | 1-6 6-2 7-66 |
| 2 | Oka(7) - Minori Takemoto | 6-2 6-4 |
| QF | Oka(7) - Yijing Zhao | 6-3 4-6 6-3 |
| SF | Ling Zhang - Oka(7) | 6-1 6-4 |
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| Saitama $10,000 Hard | Sep 2 2007 |
| 1 | Ellen Barry(4) - Oka | 6-4 6-2 |
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| Kyoto $10,000 Carpet | Sep 9 2007 |
| 1 | Oka(6) - Kazusa Ito | 6-1 5-7 6-4 |
| 2 | Oka(6) - Ayaka Maekawa | 6-4 6-73 6-1 |
| QF | Oka(6) - Yi Chen | 6-74 6-3 6-4 |
| SF | Oka(6) - Shona Lee | 6-3 4-6 6-2 |
| F | Oka(6) - Haruka Fujishiro | 6-1 4-6 6-3 |
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| Tsukuba $25,000 Hard | Sep 23 2007 |
| Qual 1 | Oka(6) - Rie Imai | 6-2 6-1 |
| Qual 2 | Yumi Nakano - Oka(6) | 6-4 6-2 |
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| Makinohara $25,000 Carpet | Oct 21 2007 |
| 1 | Rika Fujiwara - Oka | 7-5 6-2 |
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| Hamanako $25,000 Carpet | Oct 28 2007 |
| 1 | Oka - Etsuko Kitazaki | 7-68 6-4 |
| 2 | Akiko Yonemura(7) - Oka | 6-4 3-6 6-3 |
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| Kofu $10,000 Hard | Nov 4 2007 |
| 1 | Oka(2) - Manami Miura | 6-1 6-3 |
| 2 | Oka(2) - Airi Hagimoto | 6-1 7-63 |
| QF | Mayumi Yamamoto(5) - Oka(2) | 6-2 6-0 |
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| Manila $10,000 Clay | Nov 18 2007 |
| 1 | Oka(3) - Lutfiana Aris-Budiharto | 6-4 6-2 |
| 2 | Jung-Eun Kim - Oka(3) | 4-6 6-3 6-3 |
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| Manila $10,000 Clay | Nov 25 2007 |
| 1 | Oka(5) - Xi Lu | 4-6 6-3 6-2 |
| 2 | Czarina Mae Arevalo - Oka(5) | 7-60 7-5 |
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