Be nice.
Hakama are traditional Japanese male attire, kind of a coulotte or split skirt. Originally, they were meant for horseback riding, worn with shorter "kimono-jackets" rather than the long, awkward classic kimono that both men and women wore.
They're held up with long ties/straps you have to wrap and tie in a particular way so the knot doesn't become a painful pressure point on your belly. Not good when doing randori in various MAs that use that attire.