Japan's top government spokesperson underlined the agreement's cooperative element after the U.S. president complained the deal was one-sided.

US President Donald Trump on Thursday criticized the US-Japan Security Treaty, highlighting the fact that the US is obliged to defend Japan under the agreement but Japan does not offer the same security guarantees in return,

In response, government spokesman Yoshimasa Hayashi said Friday that Japan trusts Washington to keep its obligation to the two countries' security treaty.

Japan on Friday expressed its “full confidence” that the United States will fulfill its obligations under a bilateral security treaty to defend the Asian nation, after President Donald Trump questioned the long-standing pact,

President Donald Trump questioned in the Oval Office on Thursday night why the U.S. "has to protect Japan" but "they don't have to protect us," before asking: "Who makes these deals?" The answer to who makes these deals is a simple one: the United States.

Donald Trump said Japan is not required to protect the US militarily and makes "a fortune" from it economically ahead of a visit by Tokyo's trade minister.