Yamaichi Securities Co., the fourth-largest Japanese brokerage, revealed previously hidden losses before going out of business Monday in the largest Japanese business failure since World War II.

Prime Minister Ryutaro Hashimoto told reporters on his plane en route to the Asia-Pacific Economic Cooperation summit in Vancouver, British Columbia, that Yamaichi's hidden losses totaled $2.6 billion. Company officials had said the losses totaled about $2.1 billion.

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