Does someone know wherefrom the lighter bokkens come? As far as I know O Sensei teached bukiwaza only in Iwama, hence he was using the "Iwama bokken".
My teacher, Saotome Sensei, did extensive weapons work under the direction of the Founder at the Aikikai. Additionally, the Founder arranged for interested deshi to have exposure to various koryu such as Yagyu, Kashima, and Itto Ryu. It is simply wrong that the Iwama dojo was th eonly place at which weapons work was done. I have trained with Chiba Sensei, and Imaizumi sensei as well, both from that same time period and they also received substantial weapons instruction.