If there were multiple sonae, then the daimyo assumed the position in the army headquarters sonae, and the daimyo's senior vassals assumed the positions at the other sonae (however, depending on the personnel selection, young samurai could also assume such a position).
複数ある場合は本陣備は大名が、それ以外は大名の重臣（家老）がその任に就く（但し、抜擢人事により若手の侍が就く場合もある）。