Japan thrashed Kazakhstan 87-0 in Almaty, getting off to a flying start at the Asian Five Nations on Saturday.
Eddie Jones picked up his first victory as the new Japan coach of the Brave Blossoms.
Hirotoki Onozawa scored three of Japan's 13 tries. All 22 players on the team made appearances, including 10 previously uncapped players. Onozawa moved within one match of his career 70th cap -- second on the all-time Japanese list.
Japan have never lost in the four-year history of the Five Nations. They host the United Arab Emirates on May 5 in Fukuoka in what will be Jones' first home test before playing South Korea away a week later.
Japan close out the campaign in Tokyo against Hong Kong on May 19.