The legendary concept album "NIAGARA TRIANGLE Vol.1" released 50 years ago from the record label "Niagara Records" established by Eiichi Ohtaki revives in 2026 after 50 years as the masterpiece produced by Eiichi Ohtaki with Tatsuro Yamashita and Ginji Ito participating. The 50th Anniversary Edition commemorating the 50th anniversary of its release is released in three formats: a completely limited box set, a 12-inch analog record, and a Regular Edition CD. The box set and the Regular Edition CD contain as bonus video the promotional video "Fussa 45 Studio Live 1976" produced at the time of the original release. This video is an extremely valuable phantom video work featuring a studio live performance by Eiichi Ohtaki, Ginji Ito, and the musicians who participated in the recording, with the young Ryuichi Sakamoto also participating. [Inclusions] Two-disc set: a CD + a DVD *The DVD contains the video "Fussa 45 Studio Live 1976" (subject to change).