# 2018 Rakuten Japan Open Tennis Championships – Doubles

Ben McLachlan and Yasutaka Uchiyama were the defending champions but chose not to participate together. McLachlan played alongside Jan-Lennard Struff and successfully defended the title, defeating Raven Klaasen and Michael Venus in the final, 6–4, 7–5. Uchiyama teamed up with Joe Salisbury, but lost in the semifinals to Klaasen and Venus.

## Seeds

* Henri Kontinen / John Peers (first round)
* Jamie Murray / Bruno Soares (quarterfinals)
* Raven Klaasen / Michael Venus (final)
* Ben McLachlan / Jan-Lennard Struff (champions)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Draw

| First round | First round | First round | First round | First round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | H Kontinen J Peers | 6 | 6$^4$ | [7] | | | | | | | | | | | | | | |
| Q | F Martin G Simon | 3 | 7$^7$ | [10] | Q | F Martin G Simon | 6$^5$ | 6$^8$ | | | | | | | | | | |
| | R Haase M Middelkoop | 6 | 6 | | | R Haase M Middelkoop | 7$^7$ | 7$^{10}$ | | | | | | | | | | |
| | D Medvedev A-u-H Qureshi | 4 | 3 | | | | | | | | R Haase M Middelkoop | 1 | 4 | | | | | |
| 4 | B McLachlan J-L Struff | 7$^7$ | 7 | | | | | | | 4 | B McLachlan J-L Struff | 6 | 6 | | | | | |
| | J Peralta H Zeballos | 6$^4$ | 5 | | 4 | B McLachlan J-L Struff | 6 | 6 | | | | | | | | | | |
| | H Chung M Ebden | 6 | 6 | | | H Chung M Ebden | 4 | 4 | | | | | | | | | | |
| | R Gasquet A Mannarino | 4 | 4 | | | | | | | | | | | | 4 | B McLachlan J-L Struff | 6 | 7 |
| | D Inglot F Škugor | 7$^7$ | 6 | | | | | | | | | | | | 3 | R Klaasen M Venus | 4 | 5 |
| | D Džumhur S González | 6$^3$ | 2 | | | D Inglot F Škugor | 6 | 6$^7$ | [9] | | | | | | | | | |
| | S Johnson D Schwartzman | 5 | 2 | | 3 | R Klaasen M Venus | 3 | 7$^9$ | [11] | | | | | | | | | |
| 3 | R Klaasen M Venus | 7 | 6 | | | | | | | 3 | R Klaasen M Venus | 4 | 7$^7$ | [18] | | | | |
| WC | Y Nishioka K Uesugi | 3 | 6$^5$ | | | | | | | WC | J Salisbury Y Uchiyama | 6 | 6$^2$ | [16] | | | | |
| WC | J Salisbury Y Uchiyama | 6 | 7$^7$ | | WC | J Salisbury Y Uchiyama | 7$^7$ | 4 | [10] | | | | | | | | | |
| | D Sharan A Sitak | 3 | 5 | | 2 | J Murray B Soares | 6$^4$ | 6 | [3] | | | | | | | | | |
| 2 | J Murray B Soares | 6 | 7 | | | | | | | | | | | | | | | |

## Qualifying
### Seeds

* Max Mirnyi / Philipp Oswald (first round)
* James Cerretani / Nick Kyrgios (qualifying competition)

### Qualifiers

* Fabrice Martin / Gilles Simon

### Qualifying draw

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Max Mirnyi Philipp Oswald | 6 | 3 | [10] | | | | |
| | Fabrice Martin Gilles Simon | 3 | 6 | [12] | | | | |
| | Fabrice Martin Gilles Simon | 3 | 6 | [12] | | Fabrice Martin Gilles Simon | 7 | 6 |
| | | | | | 2 | James Cerretani Nick Kyrgios | 5 | 4 |
| WC | Yusuke Takahashi Yosuke Watanuki | 3 | 7 | [11] | 2 | James Cerretani Nick Kyrgios | 5 | 4 |
| 2 | James Cerretani Nick Kyrgios | 6 | 5 | [13] | | | | |