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| Pan Pacific Open Tier I Carpet | Feb 6 2005 |
| Qual 1 | Janet Lee - Sugano-WC | 6-0 6-2 |
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| Taipei $25,000 Hard | Feb 27 2005 |
| Qual 1 | Ayano Takeuchi - Sugano(13) | 7-65 6-3 |
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| Changsha $10,000 Hard | Apr 17 2005 |
| Qual 1 | Sugano(11) | bye |
| Qual 2 | Sugano(11) - Chang Liu | 6-0 6-0 |
| Qual 3 | Sugano(11) - Prim Buaklee(6) | 6-0 6-72 6-1 |
| 1 | Yan Ze Xie(1) - Sugano-Q | 6-2 6-1 |
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| Yamaguchi $10,000 Clay | Apr 24 2005 |
| Qual 1 | Sugano(10) - Mika Kawamura | 6-3 6-2 |
| Qual 2 | Sugano(10) - Sakiko Shimizu | 2-6 6-4 6-4 |
| 1 | Sugano-Q - Mitsuko Ise | 6-1 6-0 |
| 2 | Sugano-Q - Akiko Yonemura(5) | 5-7 7-63 6-4 |
| QF | Ayaka Maekawa - Sugano-Q | 6-1 6-2 |
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| Changwon $25,000 Hard | May 22 2005 |
| Qual 1 | Sugano(12) | bye |
| Qual 2 | Sugano(12) - Sung-Hee Shin | 6-2 6-4 |
| Qual 3 | Ekaterina Kosminskaya(5) - Sugano(12) | 6-1 6-3 |
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| Nagano $25,000 Carpet | May 29 2005 |
| Qual 1 | Sugano(6) - Aika Osawa | 6-4 6-3 |
| Qual 2 | Sugano(6) - Yuri Kasuya | 6-1 6-1 |
| 1 | Sugano-Q - Sayaka Umeda-Q | 6-75 6-2 6-2 |
| 2 | Chin-Wei Chan(2) - Sugano-Q | 6-74 6-2 6-4 |
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| Gunma $25,000 Carpet | Jun 5 2005 |
| Qual 1 | Sugano(11) - Danielle Kypreos | 6-3 6-2 |
| Qual 2 | Sugano(11) - Hye-Mi Kim(6) | 6-2 6-2 |
| 1 | Natsumi Hamamura(8) - Sugano-Q | 6-4 6-3 |
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| Seoul $25,000 Hard | Jun 12 2005 |
| Qual 1 | Sugano - Eun Hee Sung | 6-0 6-1 |
| Qual 2 | Sugano - Jeong-A Cho(10) | 1-6 7-5 6-1 |
| Qual 3 | Wilawan Choptang(6) - Sugano | 4-6 6-2 6-2 |
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| Incheon $25,000 Hard | Jun 19 2005 |
| Qual 1 | Christina Horiatopoulos(6) - Sugano | 6-2 6-2 |
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| Evansville $10,000 Hard | Jul 24 2005 |
| 1 | Katharine Baker - Sugano | 3-6 6-3 6-0 |
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| St . Joseph $10,000 Hard | Jul 31 2005 |
| 1 | Kristi Miller - Sugano | 7-61 6-1 |
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| Vancouver $25,000 Hard | Aug 7 2005 |
| Qual 1 | Sugano(3) - Emily Kwok | 6-2 6-2 |
| Qual 2 | Alise Vaidere(12) - Sugano(3) | 6-4 6-2 |
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| Wuxi $25,000 Hard | Aug 14 2005 |
| Qual 1 | Sugano(15) - Ting-Ting Lu | 6-1 6-2 |
| Qual 2 | Sugano(15) - Si-Si Qiu | 6-1 6-2 |
| Qual 3 | Jing Ren - Sugano(15) | 6-2 3-6 6-3 |
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| Nanjing $25,000 Hard | Aug 21 2005 |
| Qual 1 | Chun-Mei Ji - Sugano(13) | 6-3 6-2 |
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| Kyoto $10,000 Carpet | Sep 11 2005 |
| 1 | Sugano(8) - Ayumi Oka-Q | 6-4 6-4 |
| 2 | Sugano(8) - Mari Inoue | 1-6 6-4 6-2 |
| QF | Sugano(8) - Keiko Taguchi(4) | 6-3 7-5 |
| SF | Lei Huang - Sugano(8) | 7-5 7-60 |
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| Ibaraki $25,000 Hard | Sep 25 2005 |
| Qual 1 | Sugano(5) - Minori Takemoto | 6-3 6-1 |
| Qual 2 | Akari Inoue(10) - Sugano(5) | 6-0 6-3 |
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| Makinohara $25,000 Carpet | Oct 23 2005 |
| Qual 1 | Sugano(10) - Kasumi Aiko | 6-72 7-5 6-2 |
| Qual 2 | Sugano(10) - Eriko Mizuno(7) | 6-72 7-65 6-4 |
| 1 | Sugano-Q - Yurina Koshino | 7-5 6-1 |
| 2 | Chia-Jung Chuang(6) - Sugano-Q | 6-78 6-2 6-3 |
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| Tokyo $10,000 Hard | Oct 30 2005 |
| 1 | Sugano - Mari Inoue | 4-6 6-3 6-2 |
| 2 | Maya Kato - Sugano | 1-6 |
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| Busan $50,000 Hard | Nov 6 2005 |
| Qual 1 | Haruka Fujishiro - Sugano(4) | 7-64 6-3 |