Passage: As the Americans converged on Manila from different directions, they found that most of the Imperial Japanese Army troops defending the city had been withdrawn to Baguio City, on the orders of General Tomoyuki Yamashita, commander in chief of Japanese Army forces in the Philippines. Yamashita planned to engage Filipino and U.S. forces in northern Luzon in a co-ordinated campaign, with the aim of buying time for the build-up of defences against the pending Allied invasion of the Japanese home islands. He had three main groups under his command: 80,000 men of the Shimbu Group in the mountains east of Manila, 30,000 of the Kembu Group in the hills north of Manila, and 152,000 in the Shobu Group in northeastern Luzon.General Yamashita did not declare Manila an open city, although General Douglas MacArthur had done so before its capture in 1941. Yamashita had not intended to defend Manila; he did not think that he could feed the city's one million residents and defend a large area with vast tracts of flammable wooden buildings.

Question: Which Japanese army force was led by Tomoyuki Yamashita?
Japanese Army forces in the Philippines