What is my family crest or origins?

I have looked into my family ancestry a bit, and since I am a mix of several different races found different results of family names. But, I would like to know the origins and possibly the family crest, if there is one, of the surname Takashima. I believe it isn't a common surname, but I have tried to look it up with no success. It would be a great help if someone could help me.

By the way, it's off-topic though, Takashima-ya is very famous and department store with history (since 1831).
http://www.takashimaya.co.jp/store/foreign/index.html
Although the name was derived from a place name in Shiga prefecture.
https://goo.gl/maps/Jqua7

Takashima is a common family name. Family crest (kamon) varies depending where the family is from, there could be even families with the same family name in the same region with different kamon.
It is very hard to tell what is the correct kamon without detailed family history.