During early 1938, the first BR.20 were shipped to Dalian, Liaoning, in Japanese-controlled Northeast China, after which they were transported on for assembly and flight testing purposes. In Japanese service, the BR.20 (designated the I-Type ("Yi-shiki")) was used to supplement and eventually replace the obsolete Mitsubishi Ki-1, equipping a pair of bomber groups (the 12th and 98th "Sentai") located in Manchuria. The I-Type was heavily deployed on long-range bombing missions against Chinese cities and supply centers during the winter of 1938–39. The BR.20s were operating with no fighter cover at the extremes of their range and consequently incurred heavy losses from Chinese fighters, as did the early Ki-21s that shared the long-range bombing tasks.