premise: Takaaki Kajita (梶田 隆章 , Kajita Takaaki ) is a Japanese physicist, known for neutrino experiments at the Kamiokande and its successor, Super-Kamiokande. In 2015, he was awarded the Nobel Prize in Physics jointly with Canadian physicist Arthur B. McDonald.
hypothesis: Arthur B. McDonald is a Japanese physicist, known for neutrino experiments at the Kamiokande and its successor, Super-Kamiokande.
reason: Arthur B. McDonald is Canadian in the context.