| Qatar Open 2019, MS | 12/08 09:00 | 4 | Tie, Yana v Ishigaki, Yuka | L | 4-3 | |
| Qatar Open 2019, MS | 11/19 11:10 | 4 | Ishigaki, Yuka v Jihee Jeon | L | 1-4 | |
| Swedish Open (WTP) 2019, WS | 11/18 16:50 | 5 | Ishigaki, Yuka v Manika Batra | W | 4-0 | |
| Qatar Open 2019, MS | 11/18 10:30 | 6 | Ishigaki, Yuka v Dora Madarasz | W | 4-0 | |
| Qatar Open XD | 11/12 11:10 | 4 | Ishigaki, Yuka v Mima Ito | L | 1-4 | |
| Qatar Open XD | 11/11 18:40 | 5 | Ishigaki, Yuka v Soo, Wai Yam Minnie | W | 4-0 | |
| Qatar Open XD | 11/11 13:30 | 6 | Ishigaki, Yuka v Hanna Haponova | W | 4-0 | |
| Qatar Open XD | 09/16 11:30 | 4 | Meng Chen v Ishigaki, Yuka | L | 4-0 | |
| Qatar Open XD | 09/16 06:40 | 5 | Cheng, Hsien-Tzu v Ishigaki, Yuka | W | 1-4 | |
| Qatar Open 2019, MS | 09/11 08:29 | - | Pavlovich, Viktoria v Ishigaki, Yuka | L | 4-3 | |
| Qatar Open 2019, MS | 09/10 14:59 | - | Noskova, Yana v Ishigaki, Yuka | W | 1-4 | |
| Qatar Open 2019, MS | 09/10 08:54 | - | Blazhko, Anna v Ishigaki, Yuka | W | 0-4 |
Yuka Ishigaki (石垣 優香, Ishigaki Yuka, born 22 July 1989) is a Japanese table tennis player who plays a defensive, chopping style.
Ishigaki has won singles titles at the 2010 Egypt Open and the 2016 Bulgaria Open, and a women's doubles crown at the 2010 Japan Open.