Hiragana is used in Japanese when writing words that are natively Japanese and excluding most verbs and nouns. The symbols for hiragana can be easily understood and memorized from this chart.

N W R Y M H N T S K
ん(n) A
ち(chi) し(shi) I
ふ(fu) つ(tsu) U
E
O

Hiragana and Katakana also contain what are called muddied sounds. They are written by adding a modifier to a character to change the sound it creates slightly like changing a 'k' to a 'g'.

P B D Z G
A
ぢ(ji) じ(ji) I
づ(dzu) U
E
O