TOKYO - Toshiyuki Shinmachi, the embattled chairman/president/ceo of Japan Airlines agreed Wednesday to step down after an unprecedented boardroom mutiny forced him to take responsibility for the carrier's dismal financial performance and safety concerns.
    To the surprise of many, Shinmachi retains his seat as chairman but will cede his other roles to Haruka Nishimatsu, a life-long JAL employee who has spent most of his career in finance.