Tokyo stocks opened 0.24 percent lower on Monday after ending last week at their highest level in nearly seven years.
The Nikkei 225 index at the Tokyo Stock Exchange, which on Friday posted its best finish since November 2007 on the tumbling yen, slipped 39.81 points to 16,281.36 at the start.
The dollar's rise after Scotland's vote against breaking from the United Kingdom took a breather.
The greenback was at 108.95 yen in early Monday trade, compared with 108.99 yen in New York Friday afternoon.
The euro bought $1.2845 and 139.91 yen, a shade higher than $1.2832 and 139.84 yen in US trade.
Currency rates hardly moved as the Group of 20 major world economies including the United States and China said Sunday they could overcome geo-political tensions and financial risks to achieve extra combined growth of 1.8 percent.
The Dow Friday notched its third straight record high in mixed Wall Street trade on Friday as shares of Chinese online retail giant Alibaba soared following a record initial public offering.
The Dow Jones Industrial Average advanced 0.08 percent to close at 17,279.74.
In Tokyo morning trading Monday, SoftBank, which has about a one-third equity stake in Alibaba, was down 2.0 percent at 8,565.0 yen after the recent rises.
The Japanese Internet and mobile service company said Saturday it was likely to report $4.6 billion in investment gain following Alibaba's record stock offering.