As I wrote in 2015, Chatan Yara no Kon can be performed with an Uēku (paddle) without any adaption to the gripping and hand changing methods. I wonder whether there was a unilateral or a mutual influence with Tsuken Sunakake no Uēku, with which it also shares other very specific techniques.
You can learn Chatan Yara no Kon in Japan as well as in Okinawa.
Watch about how it looks here.
Besides, Maarten van Blois of Ryukyu Kobujutsu in the Netherlands also performed it with a paddle.
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