The trip so far has been dominated by USA and allies' concerns about North Korea's nuclear and missile development efforts.
"It can be interpreted as an overall review [of the US government of its trade negotiations] in regard to the trade barrier report that is expected to be released at the end of June", Yoo Il-ho, who is also finance minister, said Wednesday. North Korea's nuclear and missile development dominated the agenda on his first stop in South Korea.
But Pence struck a starkly different tone during his visit to Indonesia, which has often been praised as a successful Muslim democracy where most practise a moderate form of Islam and coexist peacefully with substantial religious minorities.
The article also accused Seoul of going along with Washington's demands and playing a confrontational role, and added that Pyongyang will continue to adopt increasingly stronger measures against growing military pressure, threats and irrational sanctions from the US.
Pence said he had spoken with Trump and by 2020 some 60 percent of the USA naval fleet would be in the region and Japan's role would grow.
Military force against North Korea has always been a hard proposition.
Capital Economics said in a research note on Wednesday a renegotiated FTA would likely mean South Korea opens more of its economy to US companies but would "have a relatively small impact on the economy".
"The United States of America will always seek peace but under President Trump, the shield stands guard and the sword stands ready", he told some 2,500 sailors gathered on the flight deck.
"I thought it was important that we went outside", Pence said.
Pence previously served as governor of IN, which has assembly plants for Japanese vehicles, and it is understood he has some appreciation for Japan's contributions to the U.S.
"The United States is proud to partner with Indonesia".
The United States is to begin discussing changes to its free trade deal with South Korea to ensure the deal is "mutually beneficial" for both countries.
Pence said the US would work with allies and others in the region to apply diplomatic and economic pressure on the regime in Pyongyang until it abandons its nuclear and ballistic missile programs.
Pence arrived in Japan on Tuesday and met with Prime Minister Shinzo Abe for discussions on security and trade.
After talks with Japan's deputy prime minister, Taro Aso, Pence said the US would work with Japan, China and other nations to get Pyongyang to give up its atomic weapons program.
"That kind of economic and diplomatic pressure will result we hope in the regime in Pyongyang forfeiting their ambitions, forfeiting their nuclear weapons program and joining the family of nations", he told CNN.
President Trump meets with Italian Prime Minister Paolo Gentiloni, 3 p.m., with news conference timing to be announced. He previously visited South Korea, where he emphasized the Trump administration's "resolve" on the North Korean nuclear threat, a theme he revisited in Japan as well.
The vice president is on a 10-day tour of Asia.
The White House said it based its statements on guidance from the Defense Department.