What did Burakumin look like?

In my novel, I have a character who is one of the "untouchables" of Japan, an Eta, or Burakumin. These were the leatherworkers who were deemed untouchable by Buddhist vegetarians. Eta were discriminated against though it was outlawed. Apparently even today,some people look into family backgrounds to make sure there are no untouchables in families before marriages take place.