You may do some research on this, but I think you will find she is probably correct.
During WWII they were forced into this by the Japanese military authorities.
Today - 2001, many Filipinas, (correct terminology for women from the Philippines), are lured into 'hostess' positions in Japan.
These 'job offers' are run by the Japanese mob, (Yakusa). They take the girls passports as soon as they arrive in Japan and are helpless to escape. They are forced into very de-humanizing pornographic acts and are often physically abused and even murdered. This is a very sad situation that needs exposure to the world. Maybe that's why she is bringing it up so prominantly in her course. I can attest to this, as I lived in Japan for many years and I am married to a lady from the Philippines.
You have received some good input in this thread.
Read it, absorb it, employ it.
Learning is what education is all about, and man you have great learning potential there!
Semper Fi,
Norb in Jacksonville