To read Japanese, we consciously need to study and learn Japanese onomatopoeia. These are one of the most expressive things in the Japanese language, and they are omnipresent in manga.
If you know of any really good or fun ways to remember any, post them below.
I will start. I made a little folded paper toy for a friend. She said, "That is ぱくぱく!”
pakupaku, パクパク、ぱくぱく, is a mouth opening and closing.
Now, I will never forget this, because it is the Paku-Man video game. How did I never know this?
In One Piece the names of Devil Fruits are constructed just like onomatopoeia. They’re mostly made up constructs, but there are some real onomatopoetic names as well, which might help you remember those. Risk of indirect spoilers though for this tip: Devil Fruit list | One Piece RP Wiki | Fandom
I have had trouble remembering the Japanese word for onomatopoeia, other than the kana version of the English word. It seems that I have heard the word コケコッコ(sound of a rooster) used for onomatopoeia words in general, but I can’t find a source for that possibly wrong knowledge right now, …