The US dollar edged higher toward the upper end of the 157 yen range in Tokyo trading this morning, as investors adjusted positions following joint intervention in the foreign exchange market by Japan and the United States. At midday Tokyo time, the dollar was trading at 157.72 to 157.73 yen, compared with 157.13 to 157.23 yen in New York and 156.76 to 156.78 yen in Tokyo yesterday. The euro stood at 1.1508 to 1.1511 dollars and 181.52 to 181.56 yen. Japanese Finance Minister Satsuki Katayama disclosed that Japan and the United States jointly intervened by buying yen on Friday, July 31, during New York trading hours, marking the first such coordinated action in 15 years. The move aimed to address excessive volatility and disorderly movements in the yen in recent months, while signaling readiness to take further steps if necessary.