Tomomi Kai

 is a Japanese women's professional shogi player ranked 5-dan. She is a former , , and title holder.
Apprentice professional.
In September 1998, Kai took a leave of absence from women's professional shogi to enter the Japan Shogi Association's apprentice school at the rank of 6-kyū. She remained in the apprentice school until August 2003 when she expressed her intention to return to women's professional play. She was awarded the rank of women's professional 1-dan upon reinstatement.
Promotion history.
Kai has been promoted as follows:
Note: All ranks are women's professional ranks.
Titles and other championships.
Kai has appeared in major title matches 12 times and has won a total of 7 titles. She has won the title four times (201011, 201314), the title twice (201314), and the title once (2010). In addition to major titles, Kai has won two other shogi championships: the 11th in 2006 and the 1st in 2007.
Awards and honors.
Kai has received the following Japan Shogi Association Annual Shogi Awards: "Women's Professional Award" in 2010 and 2013, and "Women's Professional of the Year" in 2014.