The Mitsubishi Ki-67 Hiryuu (飛龍, "Flying Dragon") was a Japanese bomber aircraft during the Second World War. The Japanese Army designation was "Army Type 4 Heavy Bomber" (四式重爆撃機). Its Allied reporting name was Peggy.
Unusual for a Japanese military aircraft of its time, it was fitted with self-sealing fuel tanks and armor. Despite this, it had good level-flight top speed comparable to its Allied counterparts like the B-25 Mitchell, good maneuverability in high-speed dives, excellent sustained rate of climb, and outstanding agility. Its bomb load is lower than its Allied counterparts but is compensated by its long range (in any case, Allied bombers rarely carried a maximum load; when they did, their range was reduced significantly).
It was designed by Ozawa Kyuunojou [小沢 久之丞] and entered combat for first time in October 1944. Due to its maneuverability, it was the basis for the Ki-109 twin-engine fighter.
