The Nikkei rebounded at the morning open in Tokyo on the 20th, rising to around ¥65,600. Buying following the previous day's gains in U.S. equities and purchases aimed at a technical rebound pushed the gain above ¥800 at one point.
The Nikkei began the morning session in Tokyo on the 20th with a rebound and has been trading around ¥350 above the previous day's close. Market participants believe buying of stock index futures by overseas investors has led the move, with the Nikkei recovering to around ¥65,600.
The Nikkei's gain temporarily exceeded ¥800. The move appears to have been driven by the broadly firm performance of U.S. equities the previous day and the U.S. Treasury Department's announcement that it would raise the ceiling on its government bond purchases. Lower long-term interest rates have also been cited as a positive factor for stocks.
Buying has spread across Japanese equities under the influence of U.S. market developments, and the Tokyo Stock Exchange's TOPIX has also rebounded. The rise in South Korea's KOSPI, which has a high weighting of semiconductor stocks, has also provided support for Japanese equities.
The market moves reflect developments in Japan, the United States and South Korea, with the trend in overseas markets supporting a short-term rebound in the domestic market.