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. Wait! Except 自 is し and not じ! That is because when you add the little dakuten you are adding to the し. When it has no dakuten, it is in the form that nature intended.
I love the nature of Japan.
It was just natural that Koichi and Koichiko fell in love with each other.
The US government told us to release Fugu into the wild.