Complete the following sentence: Tomioka returned to Naval General Staff as the department's Operations Bureau chief in December 1944, and held that position for the remainder of the war. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️
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