Japan's benchmark index climbed at Tuesday's open after the currency weakened to its worst level against the dollar in nearly four decades.
The Nikkei 225 jumped 0.9%, or 617.5 points, to 70,085.60.
The yen tumbled to its lowest since 1986 at 161.98 per dollar, surpassing its 2024 intervention threshold and heightening market vigilance for possible official action, Bloomberg News reported Tuesday, citing its own data.
Separately, Beijing placed 20 more Japanese companies on its restricted-trade list, requiring government clearance for any Chinese sales to them.