TOKYO (Reuters) -- Japanese Finance Minister Shunichi Suzuki on Thursday said authorities would not rule out any steps to deal with excessive exchange-rate swings."We are not just looking at levels themselves such as 152 yen or 153 yen but also analyzing their background," Suzuki told reporters. "We are looking with a high sense of urgency."Suzuki also said excessive currency moves are not desirable and that it was important for currencies to move stably, reflecting fundamentals.His comments came after the yen weakened past 153 per dollar, the lowest since 1990, following...