Japan 's Finance Minister Masajuro Shiokawa said the yen had strengthened too much but declined to comment on whether Japan had intervened in the market to stem the yen 's rise .
Finance Minister Masajuro Shiokawa said the yen has strengthened too much but declined to comment on whether Japan had intervened .
A former partner of accountancy firm Ernst & Young was yesterday arrested by FBI agents in the US on charges of obstructing federal investigations .