Bamboo 'Spider' walking cane.

Saw this for sale online, and was baffled as to what it is meant to represent.
The intricate design has been painstakingly applied with a hot needle, and at first I thought it was meant to look like a shark's spine stick, but I don't think it's likely.
The spider is a bronze casting, and if you look closely, it has something in its jaws,possibly a fly. I think this might be Japanese.
Any ideas what the design could be, anyone?
Thanks for looking, Bob.