Editor’s note: Sign up for Unlocking the World, CNN Travel’s weekly newsletter . Get news about destinations, plus the latest in aviation, food and drink, and where to stay. Tokyo CNN  —  One of Sumire Sekino’s most memorable Christmases involved spending the day hopping around some of Tokyo’s best date spots with her boyfriend. That day, she recalled, began with the pair snapping away at TeamLab, an immersive and extremely Instagrammable digital art installation. Then, they headed up Shibuya