No, I'm not being rude. It's the name of a vegetable (and also in fact a fruit), which the owners of Poco-a-Poco have grown themselves over more than a year, then hollowed out and painted, and have sitting in their restaurant in three different colours and sizes (representing a family). What a fun idea, I bet the kids who come love them!

In Japanese the vegetable is called ヒョウタン (pronounced 'hyoutan'), and in English it's a calabash or gourd. I've heard the word 'calabash' somewhere before but never really knew what it was.