石井茜 Ishii Akane, born August 2, 1982. Professional 3 dan of the Kansai-Ki-in. Aunt of Nakamura Sumire. Became shodan in August 2007, 2 dan in 2011, 3 dan in 2014. In April 2019, changed her professional name to Tatsumi Akane (辰巳茜), matching her legal name after marriage.
- Finished 9th in the 1st World Student Oza in 2003.
- One of eight japanese representatives in the 9th Asian New Star Match.
- Reached the challenger final of the 28th Female Honinbo tournament (2009) but lost to Aoki Kikuyo.