Tachiiri Munetsugu was a Japanese warrior and priest under the name of Ryusa.
Tachiiri Munetsugu was born circa 1580. He was the son of Munenaga.
As his family was in charge of financial affairs of the Imperial Household they endeavored to improve it. After Nobunaga Oda destroyed the Saitos in Mino (Gifu Prefecture), Nobunaga ordered Tachiiri to make improvements on the Imperial manor there. Later he tried to reconcile Nobunaga with Honganji Temple authorities.