Protagonist of Fate/Type Redline. He gets sent back in time from the year 2020. He's given a light novel from his friend telling a story of a great battle in 1945 between supernatural beings in Tokyo resulting in a massive explosion. He then ends up time-travelling back to 1945 and the light novel is accidentally used as a summoning catalyst, causing him to become the Master of Saber instead of his grandmother, Fujimiya Tsukumo.
