Abe's visit was set for Tuesday, but he arrived one day early. The president decided to take the prime minister to a local landmark upon his arrival. This April marks 150 years since the end of the Civil War.
The prime minister will receive a welcoming ceremony early on Tuesday and a state dinner in the evening. Part of the reason he is visiting Washington is to discuss a trade deal called the Trans-Pacific Partnership, which is a deal between the United States, Japan and several other major countries.
President Obama has recently received criticism from politicians in his own party, including Sen. Elizabeth Warren, D-Mass., for keeping the details of the deal a secret. Those who oppose the deal believe it could harm Internet freedoms, healthcare and the American economy. Some drafts of the deal have been leaked to the public.