However, according to an ancient Japanese text, among the seven ships, including the Powhatan, that gathered on January 16, two steamers and three sailing ships bombarded Susaki in Awa Province (present-day Chiba Prefecture).
ところが、1月16日に結集した「ポーハタン」以下七隻の内、蒸気船二隻と帆船三隻が安房国（千葉県）洲崎を砲撃した、と日本側の古文書にある。