The Foreign Ministry has called on Japanese nationals in Israel to exercise extreme caution amid growing tensions in the region.
The warning was issued Friday after Iran claimed that an airstrike on its embassy in Syria earlier this month was an act by Israel and hinted at retaliation.
On Saturday, Iran seized a cargo vessel in the Strait of Hormuz with links to an Israeli businessman.
The ministry also called on Japanese nationals staying in countries and regions other than Israel to stay away from facilities related to Israel, such as embassies.