A Japanese restaurant in Milwaukee's 3rd Ward will close its doors March 1.Nanakusa Japanese Restaurant, 408 E. Chicago St., sent a letter to its e-mail list saying the economy hurt the business.“Though my passion for the cuisine of Japan remains high and I am supported by a staff that I respect and admire, the current economic situation has made it difficult to continue as a viable business,” owner Richard Kaiser wrote.The restaurant will offer several specials in the next two weeks, starting with 50 percent off wine by the bottle, the letter...