Square is a Japanese company and here is the law in Japan
https://en.wikipedia.org/wiki/LGBT_rights_in_Japan
with just this line
"As of 2000, sexual orientation is not protected by national civil rights laws, which means that LGBT Japanese have no legal recourse when they face such discrimination in such areas as employment, education, housing, health care, and banking."
LGBT's have no protection in Japan so SE has no requirements to do any thing about it thay can do anything thay want no mater what you want(when it comes to LGBT)
also in Japan LGBT is not discussed in public
not to mention there are countries that have outright outlawed being LGBT and if Square wants to keep selling things in thoes countries thay have to keep it out of there products