Prime Minister Fumio Kishida is planning to visit Southeast Asia during the Golden Week holidays starting in late April, seeking to strengthen cooperation amid Russia's invasion of Ukraine and China's growing assertiveness in the region, diplomatic sources said Tuesday.

Kishida is planning to travel to Thailand in early May during his trip that will include Indonesia and Vietnam, while he is also considering visiting Europe in the holiday period.

During the upcoming Southeast Asia trip, Kishida is expected to underscore cooperation toward realizing the vision of a free and open Indo-Pacific amid China's rise.