Underwing carriage of torpedoes, bombs, or depth charges made the Kawanishi H8K1 and H8K2 lethal sub and shipping hunters. But their debut as land bombers the night of March 4, 1942, proved inauspicious when cloud cover obscured the prized target of Honolulu. The largely unheralded second attack by the Japanese on Oahu was a bust.
Source: general aviationJapanese seaplanes and the second bombing of Pearl Harbor