The Foreign Ministry warned against traveling to Ukraine for any reason in its second level 3 warning, which previously covered only parts of that Eastern European country and now applies to the entire nation.
According to the Japanese Foreign Ministry, some 250 Japanese citizens, including family members of embassy staff, live in Ukraine.
Chief Cabinet Secretary Hirokazu Matsuno said the government reminded Japanese residents in Ukraine to prepare for unforeseen circumstances. We will continue to closely monitor changes in the situation and take necessary measures promptly, the top official spokesman told a press conference.
Tensions have been rising on the Ukraine-Russia border, with no progress seen in talks between Western nations and Moscow on European security issues.