Keiji Furuya, chairman of the National Public Safety Commission, paid homage at the Yasukuni shrine on the 69th anniversary of Japan's surrender in World War II, an AFP journalist witnessed.
Soon after Furuya, internal affairs and communications minister Yoshitaka Shindo also visited the shrine in downtown Tokyo.
Prime Minister Shinzo Abe is widely expected to refrain from visiting on today's anniversary as he looks to mend ties with Beijing and Seoul.
Many ordinary people visit the shrine to pay their respects to family and friends who died in combat.
But visits by Japanese politicians enrage neighbouring nations, which view them as an insult and a painful reminder of Tokyo's aggression in the first half of the 20th century, including a brutal 35-year occupation of the Korean peninsula.
Abe, known for his nationalist views, drew protests himself from China and South Korea when he visited the shrine last December at a time when Japan's ties with the neighbouring countries were severely strained over territorial disputes and differences in historical perceptions.