| Date: | 23–29 November |
| Edition: | 8th |
| Category: | ATP Challenger Tour ITF Women's Circuit |
| Location: | Toyota, Japan |
| Surface: | Carpet / Indoor |
| Prize Money: | $40,000+H (ATP) $75,000+H (ITF) |
| Champms: |  Yoshihito Nishioka |
| Champmd: |  Brydan Klein /  Matt Reid |
| Champws: | Jana Fett |
| Champwd: | Akiko Omae /  Peangtarn Plipuech |
The 2015 Dunlop Srixon World Challenge was a professional tennis tournament played on indoor carpet courts. It was the eighth edition of the tournament and part of the 2015 ATP Challenger Tour and 2015 ITF Women's Circuit, offering a total of $75,000+H (ITF) and $40,000+H (ATP) in prize money. It took place in Toyota, Japan, on 23–29 November 2015.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Australia | Matthew Ebden | 107 | 1 | |
| Japan | Tatsuma Ito | 116 | 2 | |
| Australia | James Duckworth | 117 | 3 | |
| Japan | Go Soeda | 120 | 4 | |
| Japan | Yūichi Sugita | 127 | 5 | |
 Russian Federation | Konstantin Kravchuk | 138 | 6 | |
| Japan | Yoshihito Nishioka | 143 | 7 | |
| Australia | Jordan Thompson | 154 | 8 |
The following players received wildcards into the singles main draw:
Sora Fukuda Sho Katayama Makoto Ochi Yusuke WatanukiThe following player received protected ranking entry to the main draw:
The following players received entry from the qualifying draw:
Itsuki Imina Yuya Kibi Benjamin Mitchell Keisuke Watanuki| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Japan | Nao Hibino | 73 | 1 | |
 Romania | Patricia Maria Țig | 118 | 2 | |
| Stefanie Vögele | 122 | 3 | ||
 China | Zhang Kailin | 141 | 4 | |
 Belgium | Elise Mertens | 151 | 5 | |
| Japan | Misa Eguchi | 156 | 6 | |
| Japan | Naomi Osaka | 157 | 7 | |
| Japan | Risa Ozaki | 160 | 8 |
The following players received wildcards into the singles main draw:
Ksenia Lykina Makoto Ninomiya Yuuki Tanaka Aiko YoshitomiThe following players received entry from the qualifying draw:
Haruka Kaji Nicha Lertpitaksinchai Nudnida Luangnam
Cristina Sánchez QuintanarSee main article: 2015 Dunlop World Challenge – Men's singles.
Yoshihito Nishioka def. Alexander Kudryavtsev 6–3, 6–4See main article: 2015 Dunlop World Challenge – Women's singles.
Luksika Kumkhum 6–4, 4–6, 6–4See main article: 2015 Dunlop World Challenge – Men's doubles.
Brydan Klein / Matt Reid def. 
Riccardo Ghedin / Yi Chu-huan 6–2, 7–6(7–3)See main article: 2015 Dunlop World Challenge – Women's doubles.
Akiko Omae / Peangtarn Plipuech def. Luksika Kumkhum / Yuuki Tanaka 3–6, 6–0, [11–9]