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| Australian Open Hard | Jan 29 2006 |
| Qual 1 | Hisamatsu - Claudine Schaul | 3-6 6-3 8-6 |
| Qual 2 | Hisamatsu - Mariya Koryttseva(8) | 6-2 5-7 6-1 |
| Qual 3 | Ting Li (sr) - Hisamatsu | 6-4 6-2 |
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| Pan Pacific Open Tier I Carpet | Feb 5 2006 |
| Qual 1 | Hisamatsu - Tamarine Tanasugarn | 6-3 6-3 |
| Qual 2 | Hisamatsu - Iveta Benesova(1) | 6-4 6-2 |
| Qual 3 | Saori Obata(7) - Hisamatsu | 6-2 6-2 |
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| Pattaya Tier IV Hard | Feb 12 2006 |
| Qual 1 | Kateryna Bondarenko(8) - Hisamatsu | 2-6 7-65 6-2 |
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| Bangalore Tier III Hard | Feb 19 2006 |
| Qual 1 | Hisamatsu(5) - Akshita Raj-WC | 6-1 6-0 |
| Qual 2 | Hisamatsu(5) - Remi Tezuka | 6-1 6-3 |
| Qual 3 | Tatiana Poutchek(1) - Hisamatsu(5) | 6-4 6-4 |
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| Doha Tier II Hard | Mar 5 2006 |
| Qual 1 | Anne Kremer(7) - Hisamatsu | 6-3 6-1 |
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| Orange $50,000 Hard | Mar 19 2006 |
| Qual 1 | Romana Tedjakusuma - Hisamatsu | 4-6 7-62 6-2 |
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| Redding $25,000 Hard | Mar 26 2006 |
| 1 | Diana Ospina-Q - Hisamatsu(8) | 6-1 6-3 |
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| Poza Rica $25,000 Hard | Apr 2 2006 |
| 1 | Hisamatsu(6) - Jorgelina Cravero-Q | 6-0 6-4 |
| 2 | Renata Voracova - Hisamatsu(6) | 6-2 6-3 |
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| Coatzacoalcos $25,000 Hard | Apr 9 2006 |
| 1 | Hisamatsu(5) - Renata Voracova | 7-5 6-3 |
| 2 | Zsofia Gubacsi - Hisamatsu(5) | 6-4 7-60 |
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| Dothan $75,000 Clay | Apr 23 2006 |
| 1 | Lioudmila Skavronskaia - Hisamatsu | 6-1 6-2 |
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| Lafayette $50,000 Clay | Apr 30 2006 |
| 1 | Miho Saeki - Hisamatsu | 6-3 6-2 |
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| Gifu $50,000 Carpet | May 7 2006 |
| 1 | Chin-Wei Chan - Hisamatsu(5) | 6-3 6-3 |
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| Fukuoka $50,000 Carpet | May 14 2006 |
| 1 | Hisamatsu(3) - Napaporn Tongsalee | 6-2 5-7 6-4 |
| 2 | Hisamatsu(3) - Kumiko Iijima-Q | 2-6 7-5 7-5 |
| QF | Katie O'Brien - Hisamatsu(3) | 6-2 6-2 |
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| Roland Garros Clay | Jun 11 2006 |
| Qual 1 | Marina Erakovic - Hisamatsu | 6-3 6-2 |
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| Wimbledon Grass | Jul 9 2006 |
| Qual 1 | Maria Jose Argeri - Hisamatsu | 6-2 5-7 7-5 |
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| Nagoya $25,000 Hard | Jul 9 2006 |
| 1 | Hisamatsu(1) - Ayami Takase | 6-3 6-2 |
| 2 | Hisamatsu(1) - I-Hsuan Hwang | 6-3 6-4 |
| QF | Hisamatsu(1) - Chia-Jung Chuang(7) | 6-4 6-4 |
| SF | Hisamatsu(1) - Seiko Okamoto(4) | 3-6 6-0 6-3 |
| F | Erika Takao(3) - Hisamatsu(1) | 4-6 6-2 6-0 |
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| Miyazaki $25,000 Carpet | Jul 16 2006 |
| 1 | Yi Chen-Q - Hisamatsu(1) | 6-3 6-2 |
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| Tokachi $25,000 Carpet | Aug 6 2006 |
| 1 | Hisamatsu(2) - Ayaka Maekawa-LL | 6-2 6-4 |
| 2 | Hisamatsu(2) - Maika Ozaki-Q | 7-68 6-2 |
| QF | Hisamatsu(2) - Ayami Takase(6) | 6-3 3-6 6-2 |
| SF | Ayumi Morita(4) - Hisamatsu(2) | 6-0 4-6 6-1 |
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| US Open Hard | Sep 10 2006 |
| Qual 1 | Hisamatsu - Michaela Pastikova | 6-4 6-4 |
| Qual 2 | Alisa Kleybanova - Hisamatsu | 5-7 6-3 6-3 |
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| Ibaraki $25,000 Hard | Sep 24 2006 |
| 1 | Hisamatsu(3) - Liga Dekmeijere | 6-1 6-0 |
| 2 | Hisamatsu(3) - Antonia Matic | 6-3 7-65 |
| QF | Hisamatsu(3) - Seiko Okamoto(5) | 6-3 6-0 |
| SF | Hisamatsu(3) - Kumiko Iijima(8) | 6-3 6-4 |
| F | Hisamatsu(3) - Akiko Yonemura(7) | 6-2 3-6 7-5 |
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| Tokyo $50,000 Hard | Oct 1 2006 |
| 1 | Hisamatsu(7) - I-Hsuan Hwang | 6-2 6-4 |
| 2 | Hisamatsu(7) - Nudnida Luangnam-Q | 6-1 6-3 |
| QF | Hisamatsu(7) - Ryoko Fuda(3) | 7-5 6-4 |
| SF | Yung-Jan Chan(1) - Hisamatsu(7) | 6-3 5-7 6-4 |
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| Japan Open Tier III Hard | Oct 8 2006 |
| Qual 1 | Raluca Olaru - Hisamatsu | 4-6 7-68 6-4 |
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| Makinohara $25,000 Carpet | Oct 22 2006 |
| 1 | Chiaki Okadaue - Hisamatsu(3) | 7-65 6-3 |
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| Hamanako $25,000 Carpet | Oct 29 2006 |
| 1 | Hisamatsu(3) - Tomoyo Takagishi | 6-2 6-3 |
| 2 | Hisamatsu(3) - Mari Tanaka | 6-3 6-1 |
| QF | Hisamatsu(3) - Tomoko Yonemura(8) | 7-5 6-1 |
| SF | Hisamatsu(3) - Erika Takao(1) | 7-5 3-6 6-4 |
| F | Hisamatsu(3) - Seiko Okamoto(6) | 6-2 6-4 |
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| Sutama $25,000 Clay | Nov 5 2006 |
| 1 | Hisamatsu(3) - Yurina Koshino-Q | 6-1 6-2 |
| 2 | Hisamatsu(3) - Natsumi Hamamura | 2-6 6-0 7-64 |
| QF | Hisamatsu(3) - Florence Haring(6) | 6-4 6-4 |
| SF | Su-Wei Hsieh - Hisamatsu(3) | 6-4 6-2 |
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| Kaohsiung $75,000 Hard | Nov 19 2006 |
| 1 | Hisamatsu(6) - Marina Erakovic | 2-6 7-61 |
| 2 | Kai-Chen Chang - Hisamatsu(6) | 7-63 6-3 |
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| San Diego $50,000 Hard | Dec 3 2006 |
| 1 | Story Tweedie-Yates - Hisamatsu(5) | 6-4 6-2 |
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| Dubai $75,000 Hard | Dec 17 2006 |
| 1 | Mervana Jugic-Salkic - Hisamatsu | 6-2 6-0 |