This is awesome that a Japanese band (besides OOR and X Japan) are holding US tours, but @mab0roshi is right. Doesn't seem like this band is all female - one of the members looks male to me.
The press release specifically said "Tricot is a Japanese all-female alternative rock band"
I've been following Tricot for about 5 years. They have always been 3 women and 1 mystery gender person, like this new 4th member. Is that a man? Who can say for sure?