What are the grammatical rules for using filler words in Japanese(e.g. ええと, なんか, あの, and so on)?


I found a bit interesting bits on them through some research, but nothing
about what the grammatical rules are for using them all. Any ideas?




Fillers are [speech
disfluency](https://en.wikipedia.org/wiki/Speech_disfluency). It's part of
speech but not grammar. Use them to fill voids in speech just like English
speakers use "Um..", "well..", "like.."

