The manual published in march 2019 is intended to be distributed to libraries and Gōjū-ryū related dojos, etc. It is not for sale.
  According to the Okinawa Prefecture karate promotion division, the distribution is finished. However, there are some remaining copies (around 10 copies) in the foreign language versions. For people other than those who have already received copies, and those who can come directly to the karate promotion division to pick up a copy, we can provide a copy (up to one manual per person).
  This offer is on a first-come, first-served basis and will end as soon as all manuals have been distributed. If you wish to receive a copy, make an inquiry in advance by e-mail.

(Contact information)
Okinawa Prefecture Karate Promotion Division
Address: 1-2-2 Izumizaki, Naha, Okinawa Prefecture (12th floor)
E-mail: aa082500@pref.okinawa.lg.jp