Category:Japanese words with nonphonetic spellings
Japanese hiragana and katakana are generally phonetic spellings of the sounds of Japanese words. However, the three very common particles は, へ, and を and compounds containing them are exceptions. These kana would normally be romanized and pronounced ha, he, and o respectively. However when used for the common particles they are pronounced wa, e, and o respectively, which would be normally written わ, え, and お.
Besides these common particles there are some historic kana spellings which are seen from time to time.