In 1560 he defeated Yoshimoto IMAGAWA who had an extremely larger military force than Nobunaga at the Battle of Okehazama, which made his name famous all over the country.
永禄3年（1560年）、兵力的に圧倒的優位にあった今川義元を桶狭間の戦いで破り世に名を轟かせた。