Its reported sales have declined about 40 percent since 2000, to less than $4 billion.
She said sales had declined 75 percent during the last two years.
Sales declined from a high of $334 million in 1987.
Sales have declined in each of the last two years.
During the first nine months of 1999, sales declined by 18 percent over the same period in 1998, to $491.4 million.
But in average terms, the agency says, sales have been declining 3 percent a year since 1983.
From 1990 to 1995, the company's sales in Japan declined by 40 percent.
However, the firm's sales declined each year the design continued without significant change.
Sales declined after the war had ended, and these were difficult years for the company.
Sales in stores open more than one year declined 1 percent.