The Battodo and Iaido Taikai, San Diego was held on 28th August 2020 at Miramar Collage in San Diego, CA U.S.A.
See details here in the page of News/ニュース
International Batto-Do Federation (IBF for short) is an organization of Battodo to include Toyama Ryu Iaido and Nakamura Ryu Battodo, organized by the 1st generation Soke Nakamura Taisaburo Sensei.
Film The ART of KILLING
Nakamura Taisaburo (1912-2003)
Founder, the 1st generation Soke of Nakamura Ryu Battodo