On the economic front, the Japanese prime minister is planning to impress upon the USA president the significance of multilateral free trade as Trump has pushed for bilateral trade agreements.
China and Japan took another step toward mending their troubled relations Monday, resuming high-level economic talks for the first time in almost eight years.
During the talks, Abe will want to make sure Trump doesn't cut a deal with North Korea that leaves Japan exposed to shorter-range missiles that do not necessarily threaten the U.S. He also is expected to ask the U.S. leader to raise with North Korean leader Kim Jong Un the issue of Japanese abducted by North Korea in the 1970s and 1980s.
Last year, residents of Hokkaido were twice warned to seek shelter after North Korea test-fired two missiles that flew over the northern Japanese island, albeit at very high altitudes.
In response, the White House made clear Trump is concerned about the security of US allies in addition to the American people.
Wang is the first Chinese foreign minister to visit Japan in a bilateral context in nine years.
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Courting Trump "did Abe's image some good domestically for a while. but such efforts have not produced enough results if you look at things objectively", Professor Mieko Nakabayashi, an expert in US-Japan relations at Waseda University, told Agence France-Presse.
"Having been surprised by Trump's decision to meet with Kim, Abe is determined to convince the United States president to take a skeptical approach to Pyongyang", said Tobias Harris, vice-president of Teneo Intelligence, a Washington-based advisory firm.
Chinese President Xi Jinping's Belt and Road Initiative, unveiled in 2013, aims at building a modern-day Silk Road connecting China by land and sea to Southeast Asia, Central Asia, the Middle East, Europe and Africa.
Koizumi, who was Prime Minister from 2001-06, told Aera magazine published on Monday that Abe has found himself in a "dangerous" situation over the scandals. Abe is heading to Trump's Mar-a-Lago resort Tuesday, April 17, 2018 for two days of talks, hoping to keep Japan's interests on the table in a possible U.S.
Abe also faces challenges on trade.
Abe will likely try to get Trump to reverse his decision to include Japan in new steel and aluminum tariffs.