TOKYO - Japanese Prime Minister Shinzo Abe raised his right fist and gamely did President Rodrigo Duterte's signature pose as both leaders reaffirmed their "unshakable" alliance over dinner Wednesday.

Duterte heaped praises on Tokyo describing Manila's top source of development assistance as "a friend closer than a brother."

"This is a relationship that stands on unshakeable, firm ground by all counts," he said before offering a toast.

Duterte said the Philippines was giving Japan "its right place in the constellation of Philippine friends," citing Tokyo's "demonstrative concern and respect" for Filipinos.

This year marks 60 years since diplomatic ties between the two countries went back to normal after World War II. Japan has also been a strategic partner of the Philippines since 2011.

Abe noted Duterte's "passion" for Washoku ("Japanese food") and said he "took the initiative" to prepare the banquet for the Philippine leader at the Prime Minister's residence.

"If you like it, please do come back to Japan as you wish to enjoy another batch of Washoku," he told Duterte.

Abe said he gave a "rousing welcome" to Duterte, citing the "deep, warm, family-like or brotherly relationship" between their countries.

"My sincere hope is to develop our future in full bloom together with Mr. President," Abe said.