2026 Shimadzu All Japan Indoor Tennis Championships – Doubles
2026 tennis event results
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Saki Imamura and Park So-hyun were the defending champions[1] but Imamura chose not to participate. Park partnered Tian Fangran, but lost in the first round to Hayu Kinoshita and Sara Saito.
| Doubles | |
|---|---|
| 2026 Shimadzu All Japan Indoor Tennis Championships | |
| Champions |  Sofia Costoulas Sofya Lansere |
| Runners-up |  Hayu Kinoshita Sara Saito |
| Score | 6–2, 6–4 |
Sofia Costoulas and Sofya Lansere won the title, defeating Kinoshita and Saito 6–2, 6–4 in the final.
Seeds
Momoko Kobori / Ayano Shimizu (withdrew)
Cho I-hsuan / Cho Yi-tsen (first round)- Mana Ayukawa / Kanako Morisaki (semifinals)
- Hiroko Kuwata / Ikumi Yamazaki (quarterfinals)
Draw
Key
- Q = Qualifier
- WC = Wild card
- LL = Lucky loser
- Alt = Alternate
- ITF = ITF entry
- PR = Protected ranking
- SR = Special ranking
- SE = Special exempt
- JE = Junior exempt
- JR = Junior Accelerator Programme entrant
- CO = College Accelerator Programme entrant
- NG = Next Gen Accelerator Program entrant
- w/o = Walkover
- r = Retired
- d = Defaulted
Draw
| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| Alt | Y Hosoki N Katsumi
| 5 | 3 | ||||||||||||||||||||||||
| WC | A Nagata H Sato
| 7 | 6 | WC | A Nagata H Sato
| 6 | 3 | [10] | |||||||||||||||||||
| S Costoulas S Lansere
| 2 | 6 | [10] | S Costoulas S Lansere
| 3 | 6 | [12] | ||||||||||||||||||||
 Y-h Lee Y Zhang
| 6 | 4 | [8] | S Costoulas S Lansere
| 4 | 6 | [10] | ||||||||||||||||||||
| 3 | M Ayukawa K Morisaki
| 6 | 4 | [13] | 3 | M Ayukawa K Morisaki
| 6 | 2 | [8] | ||||||||||||||||||
| N Kawaguchi Y Yang
| 3 | 6 | [11] | 3 | M Ayukawa K Morisaki
| w/o | |||||||||||||||||||||
K Okamura P Plipuech
| w/o | K Okamura P Plipuech
| |||||||||||||||||||||||||
| Z Bai Y Ma
| S Costoulas S Lansere
| 6 | 6 | ||||||||||||||||||||||||
 S-h Park F Tian
| 3 | 6 | [8] | H Kinoshita S Saito
| 2 | 4 | |||||||||||||||||||||
| H Kinoshita S Saito
| 6 | 4 | [10] | H Kinoshita S Saito
| 6 | 6 | |||||||||||||||||||||
| WC | N Suzuki K Tsutsumi
| 3 | 2 | 4 | H Kuwata I Yamazaki
| 4 | 4 | ||||||||||||||||||||
| 4 | H Kuwata I Yamazaki
| 6 | 6 | H Kinoshita S Saito
| 5 | 6 | [10] | ||||||||||||||||||||
| M Matsuda E Shimizu
| 3 | 4 | WC | R Tsuda K Yoshida
| 7 | 2 | [7] | ||||||||||||||||||||
| WC | R Tsuda K Yoshida
| 6 | 6 | WC | R Tsuda K Yoshida
| 6 | 7 | ||||||||||||||||||||
 R Șerban K von Deichmann
| 3 | 77 | [10] | R Șerban K von Deichmann
| 3 | 5 | |||||||||||||||||||||
| 2 | I-h Cho Y-t Cho
| 6 | 65 | [1] | |||||||||||||||||||||||