What is the longest (based on their representation in romaji) word in Japanese? Are there any longer than リュウグウノオトヒメノモトユイノキリハズシ? If it depends on criteria for a word, then list them by their criteria.
Background: I'm wanting to use a long word for a JRuby bug report, and I think that floccinaucinihilipilification is pretty worthless. Wikipedia's article on Longest words (by language) is currently lacking an entry for Japanese.