Kiyonaga was also active in various battles. He transported provisions to Otaka Castle at the Battle of Okehazama 1560, helped suppress the Ikkō-ikki of Mikawa Province including Battle of Batogahara 1564, joined in the pacification of Tōtōmi Province at Siege of Kakegawa 1569, and took part in the Battle of Komaki and Nagakute 1584. Kiyonaga also assisted with ship construction for the Seven-Year War (1592-1598).