In 1859 Tomoari died away from his home while conducting investigation in Kumano region, and was buried at the hongu (main shrine) in that place (Hongu-cho, Tanabe City).
安政6年（1859年）、伴存は熊野地方での調査中に倒れて客死し、同地の本宮（田辺市本宮町）にて葬られた。