“Viva Video! The Art and Life of Shigeko Kubota,” the first major survey of the work of the pioneering artist in Japan in three decades, opens at the Museum of Contemporary Art Tokyo (MOT). A fixture in Fluxus, Kubota made pioneering contributions to video sculpture, exploding the screen into scenes and structures bathed in shapes and colour. “Viva Video!” includes the triumphant Skater (1991-2, image), the cascading Niagara Falls (1985), and her signature Duchampiana series (1970-90).