JR 137
Grandmaster
What would either shed some light or muddy the waters more on if Higashionna used open or closed hands would be to see it done in Toāon Ryu. Allegedly, Toāon Ryuās (Kyoda Juhatsu?) founder kept Higashionnaās art as intact as possible. Kyoda allegedly started learning from Higashionna about a month before Miyagi and continued to train under him until Kyoda went to Japan to start teaching there. The name Toāon Ryu somehow translates into Higashionnaās school.Uechi-ryu sanchin is done open handed with a moderate amount of dynamic tension. all of the other karate styles do sanchin with a closed fist and a greater amount of tension and these styles can follow their lineage to Chojun Miyagi. Legend says that Miyagi's teacher, Kanryo Higaonna did his sanchin with the open hand and by the descriptions i have heard it sounds very similar to the Uechi- ryu version. it was Miyagi that closed the fists and made some alterations to the kata. the outlier in this is Ryuei- ryu which is an Okinawan style that claims its origins back to China. But they share an identical sanchin with Goju, closed fists & same pattern. while Ryuei -ryu claims to be direct from China the "genetic markers" tell us their sanchin is derived from Miyagi as well.
all that being said, to see open hand versions of sanchin one has to look to China and the kung-fu systems.
Furthermore, Miyagi allegedly taught Sanchin open and closed hand, and with and without turns. I think the open hands and without turns was the oldest/original version he taught, and he evolved it to closed hands and turns over the years. He was also known to teach kata differently to different students who were training together, adapting the kata to the individualsā strengths.
From everything Iāve read about Toāon Ryu, which there isnāt very much out there, Kyoda kept Higashionnaās teachings intact. Iāve looked for Toāon Ryu Sanchin videos, but havenāt found anything.