While serving as Chief Hokkaido Development Commissioner, Kuroda was on board a merchant ship and, when he became drunk, tried to shoot the shore reef with a cannon on ship for fun (merchant ships of the time were also armed to avoid pirates) and killed a resident.
開拓長官時代、商船に乗船したとき、酒に酔って船に設置されていた大砲（当時は海賊避けのため商船も武装していた）で面白半分に岩礁を射撃しようとして誤射し、住民を殺めてしまったことがある。