http://www.takaratomy.co.jp/products/gigapudding/
What is the point of making such a product?
The key to the answer is that in Japan, there has been a trend to make things extremely big, especially food items.
let me give you another example…
This is a tower burger of lotteria Japan.(a fast food chain)
As you can see having MEGASIZE food has been a pretty common trend in japan for the past year or so.
It is important to follow the trend and introduce the right product at the right timing.