Three color DANGO by Hiroshi Iwahara (Karakuri) - RARE

This puzzle has only been up for auction twice, the last time was almost four years ago.  Here's your chance!

I want to note that I feel like there's something hidden with this puzzle.  I've solved it, and it's wonderful, like you'd expect from an Iwahara puzzle.  But it also seems like maybe there's something more.  I couldn't find any information within the puzzle or on the internet, but if you buy this, and you find something beyond the initial solve, please let me know!

Per the Karakuri website:

The puzzle is located in the United States, but I will ship worldwide.
Customs forms for international shipments will reflect actual payments.
Payments can be made through PayPal (Friends & Family preferred).
Buyer to pay shipping calculated after auction.
Buyer may choose supplemental insurance at their expense.
Please wait for the updated invoice before making payment.