Hello
That's indeed very interesting, especially from a linguist's point of view. I've been working with English vocabulary for a couple of years already; analyzed a huge amount of vocabulary clusters from different languages, but Japanese ones impress me most. I used to work for Fluentu.com too.
My last research about fugu was published by dissertation services Research Center as well (took me 2 months to work on the word origin and meaning). In fact, I had also to fins information on tetrodotoxin it produces (learned a lot myself).