Thank You Hiroyuki San, I have always thought yomogi was mugwort. The other confusion I have on this thread is with Fuki. I have always thought fuki was a type of coltsfoot. I'm not sure if that's the correct spelling. There are many different species of both types of plants and I have found they all taste a little different. This difference might come from the type soils the sansai are grow in as well the different species. Maybe another word for aku would be astingent. I've heard some Oban Chan use the word removing the "ash" for aku.