Since he was familiar with the geography of Kawachi, he assumed the positionas a guide during the Osaka no Jin (The Siege of Osaka), and and eventually promoted to hatamoto (direct retainers of the bakufu, which is a form of Japanese feudal government headed by a shogun) with an increase in territory.
大坂の陣では河内の地理に詳しいことから道案内をつとめ、加増を受けて旗本となった。