Azai Nagamasa is the daimyo of the Azai clan, husband of Oichi, brother-in-law to Oda Nobunaga and an ally of Asakura Yoshikage. He has a sister named Kyōgoku Maria. He is only mentioned in Sengoku BASARA 3 within Oichi's dialogues, indicating his death was a stepping stone to her own fall from grace. He makes an appearance in Sengoku BASARA 4 as a playable character. He is unlocked by completing Shibata Katsuie's story. Completing his story will unlock Oichi.