Tracked down his biological sister after 50 years of searching. Good morning and welcome to Al Jazeera America. Im stephanie sy. Im del walters. Its been three years since the president talked about his asian promise. He made good to shore up diplomatic and economic ties, he arrived in japan for the first leg of a week long tour of asia. He will make stops in south korea, malaysia and philippines. The president reiterated plans to reassert the u. S. As a pacific nation, saying our strategy is a long term commitment to this region and its people and im proud of our progress so far. The president who wont visit china pledged to build a relationship with the country saying it would not come at the expense of japan or any other ally. First stop, japan where rising nationalism has raised alarms. A high stakes dispute between japan and china over a set of remote islands threatens to become a live fire conflict. What could degenerate rather rapidly through a mistake or miscalculation in the c