Japan has its own Ganpati Bappa. BUT, you are not supposed to see him
Stories, symbols and rituals are the primary way to transmit ideas across generations and the Hindu religion uses symbols in form of idols extensively. So to represent Wisdom, you can look at a few attributes like,
WIDE EARS - Ability to assimilate a lot of input or listen
SMALL MOUTH - Talk less
FLEXIBLE TRUNK - High Adaptability
LARGE STOMACH - Ability to digest both good and bad
These traits collectively find the depiction in the popular elephant-headed Hindu god of wisdom Ganesh/Ganapati. Indian tradition of "DARSHAN" or OBSERVATION implies, keeping your eyes open and understanding what the form communicates. Unfortunately, Ganesh or Ganpati in Japan is a form which cannot be publicly shown for reasons which are interesting to understand.
That said, from childhood, Ganesha has been worshipped at my home annually and I continue this tradition today at my home in Japan for the past 26 years. The below idol at my home in Tokyo is installed every Ganesh Chaturthi and is worshipped for ten days.