Rakuten Japan Open Tennis Championships 2018 / Qualification
This article shows the results of the qualifying rounds for the 2018 Men's Rakuten Japan Open Tennis Championships . For the tournament in the ATP World Tour 500 category , four players qualified in singles or a pairing in doubles, each of which was determined in two rounds. A total of 16 players and four pairs took part in the qualification, which took place on September 29 and 30, 2018.
singles
Seeding list
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Explanation of symbols
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Results
| First round | Qualifying round | |||||||||||
| 1 |  Daniil Medvedev
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6th | 6th | |||||||||
| OLD |  Hiroki Moriya
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3 | 3 | |||||||||
| 1 | Daniil Medvedev
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6 4 | 6th | 6th | ||||||||
| PR |  Jahor Herassimau
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7th | 3 | 3 | ||||||||
| PR | Jahor Herassimau
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6th | 6th | |||||||||
| 5 |  Marius Copil
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4th | 3 | |||||||||
| 2 |  Martin Kližan
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6th | 6th | |||||||||
 Prajnesh Gunneswaran
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4th | 2 | ||||||||||
| 2 | Martin Kližan
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6th | 6th | |||||||||
| 6th |  Bradley Klahn
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3 | 4th | |||||||||
 Ruben Bemelmans
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6th | 3 | 6 4 | |||||||||
| 6th | Bradley Klahn
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2 | 6th | 7th | ||||||||
| 3 | Denis Kudla
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6th | 3 | 6th | ||||||||
 Horacio Zeballos
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2 | 6th | 4th | |||||||||
| 3 | Denis Kudla
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6th | 1 | 6th | ||||||||
| Yasutaka Uchiyama
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3 | 6th | 3 | |||||||||
| WC | Yasutaka Uchiyama
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6th | 6th | |||||||||
| 7th |  Hubert Hurkacz
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2 | 2 | |||||||||
| 4th | Mackenzie McDonald
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4th | 6th | 3 | ||||||||
| WC | Tatsuma Ito
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6th | 1 | 6th | ||||||||
| WC | Tatsuma Ito
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2 | 4th | |||||||||
| WC | Yōsuke Watanuki
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6th | 6th | |||||||||
| WC | Yōsuke Watanuki
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6th | 6th | |||||||||
| 8th | Tim Smyczek
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4th | 2 | |||||||||
Double
Seeding list
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Explanation of symbols
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Results
| First round | Qualifying round | |||||||||||
| 1 | Max Mirny Philipp Oswald
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6th | 3 | [10] | ||||||||
 Fabrice Martin Gilles Simon
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3 | 6th | [12] | |||||||||
| Fabrice Martin Gilles Simon
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7th | 6th | ||||||||||
James Cerretani Nick Kyrgios
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5 | 4th | ||||||||||
| WC | Yūsuke Takahashi Yōsuke Watanuki
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3 | 7th | [11] | ||||||||
| 2 | James Cerretani Nick Kyrgios
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6th | 5 | [13] | ||||||||