TEFL jobs in Japan, do they check your social media before hiring?

Just curious because I saw they could potentially not hire you if you have a lot of political stuff on your social media, is that true? Even if the "political" stuff on your page is in SUPPORT of rights and equality and not hateful Trump supporter type content? Also, if you curse a lot on social media would they not hire for you that? Just want to know what I should be aware of. I've Googled it trying to see what info Google had but it wasn't specific or helpful really. Thanks!