In 1203, Yoshikazu fell ill, and passed on to Ichiman the responsibilities of serving as both jitô and shugo of the 28 provinces of the Kantô. However, the post of jitô of the 38 provinces of Kansai was given to Minamoto no Sanetomo, who was backed by the Hôjô clan. Battle broke out between Hiki Yoshikazu and Hôjô Tokimasa, and Yoshikazu was killed in Tokimasa's mansion. The Hôjô forces closed in on the Hiki mansion, and burned it down; young Ichiman and his mother Wakasa no tsubone died along with many other members of the clan.
- "Ichiman." Kamakura-burabura.com.