There are changes in the seminar schedule for 2023 as follows.

Fureai-no-Kai
All for the first half of 2023 are canceled.
January 23 (Mon): Canceled as announced on Dec 6
February 11 (Sat/Holiday): Canceled
March 11 (Sat): Canceled
April 8 (Sat): Canceled
May 13 (Sat): Canceled
June 10 (Sat): Canceled

Iris-no-Kai
March 13 (Mon): Canceled

Ryukyu Do Ai
Sogobiken has taken over the seminar as the organizer and changed the name to Path to Peace, and then the one scheduled for February is canceled. All other dates formerly scheduled as Ryukyu Do Ai remain as Path to Peace.
January 27 – 29 (Fri – Sun): Changed to Path to Peace @Sen-in Kaikan
February 24 – 26 (Fri – Sun): Canceled
March 24 – 26 (Fri – Sun): Changed to Path to Peace @Sen-in Kaikan
April 28 – 30 (Fri, Sat/Holiday, Sun): Changed to Path to Peace @Sen-in Kaikan
May 26 – 28 (Fri – Sun): Changed to Path to Peace @Sen-in Kaikan
June 23 – 25 (Fri – Sun): Changed to Path to Peace @Sen-in Kaikan