Time Out says
Coffee and people watching go hand in hand, so if you manage to nab a seat at this perpetually busy Starbucks, you’re in for a treat. Both tourists and long-time Tokyoites find it difficult to resist capturing a time-lapse of the mobs crossing the intersection with their chosen smartphone apps while sitting at the counter with their lattes. The nearest metro exit is also a popular spot for buskers and street dancers after sundown, so you might glimpse some talent worthy of your attention while you’re there. The coffee shop is part of an eight-storey Tsutaya, so if you can’t immediately find an open seat, it’s worth browsing the selection of books, CDs and games until a space becomes available.