Your special skill is your specialty. So, what is your 特技?
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
My specialty is boiling water. I don't have a single skill outside of that.
The guy in the blue shirt about six people behind me in the line was one of my classmates in high school and he has a specialty where he can play the Sailor Moon theme song with his farts.
Koichi’s specialty is making desserts. He said he likes making them because he likes seeing everyone’s happy faces.