Mai 2

Mai is also used as a masculine name in Japanese. However, it's more common for females. So, I think that the "Gender" of this name should be changed from "Feminine" to "Feminine & Masculine". Some evidence for this is that Mai is also used as a name element in unisex and masculine Japanese names such as Maisuke, Maihito, Maihitoshi, and Maihiko.

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Sources: https://forebears.io/forenames/mai
https://forebears.io/x/forenames/maisuke
https://forebears.io/x/forenames/maihito
https://forebears.io/x/forenames/maihitoshi
https://forebears.io/x/forenames/maihiko

Mai was especially common in Japan in the 1980s and 1990s.

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舞 (dance) and 麻衣 (linen, robe) are both popular spellings and both made the top 10 of the most popular girls names in Japan.

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As 麻衣 (linen, robe) it entered the top 10 in 1983. It peaked at #2 in 1984 and 1985. It last made the top 10 in 1994.

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It entered the top 10 as 舞 (dance) in 1985. It peaked in 1992 and 1993 at #3 and was last in the top 10 in 1998.

The first kanji used for Mai (舞) was given to 95 boys from 1989-2003 (61 of whom were born in 1989) compared to 18801 girls born in the same period.

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Source: http://www.namaejiten.com/