Google: Whalingwasan importanterainAmericanindustry.Japan'swithdrawalwasinthe housefor a long time,America isheaded.Sincethe amountoffallenwhalecaughtneartheUnited States,under the direction ofthe portyou wantyour bosstoallowrefuelingofJapanesewhalingnearthe house,theycametobefriendswith Japan.Thus,black shipsarrived!
Yahoo:The times when it is the industry whose whaling is important in America. It pulls for a long time and is confined and America faces to the Japanese house which is in. America being soon, because the quantity of the whale which you can catch decreased, the Japanese house being soon, receiving whaling permission and the indication of the superior who wants the refueling port, it came to the appearance in Japan and the friend. Hiding, the black boat did!
Hetalia Wiki: America decides to make friends with whales, but must convince Japan to come out of isolation first (Black Ships Have Come!).