The Female Strongest (or Saikyo) in English refers to two different tournaments in Japan: one present and one past. Japanese names of them are slightly different.
1) (扇興杯女流囲碁最強戦) Senko Cup (domestic) In 2016 a new tournament started with the sponsorship of SENKO Group Holdings. Note that there is an international version of the tournament, Senko Cup World Go Female Strongest.
|1st||2016||Xie Yimin||Mukai Chiaki|
|2nd||2017||Fujisawa Rina||Xie Yimin|
|3rd||2018||Mannami Nao||Nyu Eiko|
|4th||2019||Fujisawa Rina||Xie Yimin|
|5th||2020||Ueno Asami||Xie Yimin|
|6th||2021||Fujisawa Rina||Ueno Asami|
|7th||2022||Nyu Eiko||Nakamura Sumire|
2) (東京精密杯女流プロ最強戦)Tokyo Seimitsu Cup was a Japanese tournament for female professionals. It started in 1999 and discontinued in 2008.
The winner of this tournament played an exhibition match against a Westerner each year: the opponent was decided in a playoff between an American and a European representative selected at the US Go Congress and the European Go Congress, respectively.
|1st||1999||Shinkai Hiroko||Yashiro Kumiko|
|2nd||2000||Kato Tomoko||Aoki Kikuyo|
|3rd||2001||Aoki Kikuyo||Yoshida Mika|
|4th||2002||Okada Yumiko||Umezawa Yukari|
|5th||2003||Suzuki Ayumi||Nakazawa Ayako|
|6th||2004||Shinkai Hiroko||Okada Yumiko|
|7th||2005||Kobayashi Izumi||Konishi Kazuko|
|8th||2006||Xie Yimin||Konishi Kazuko|
|9th||2007||Suzuki Ayumi||Aoki Kikuyo|
|10th||2008||Kato Keiko||Xie Yimin|