
In early versions of hiragana there were often many different characters to represent the same syllable; however the system was eventually simplified so that there was a one to one relationship between spoken and written syllables. The present orthography of hiragana was codified by the Japanese government in 1946.
In column the rōmaji appears on the left, the hiragana symbols in the middle and the kanji from which they developed on the right. There is some dispute about which kanji the hiragana developed from.