Around lunchtime a guy was practising his fue in Kitanomarukōen 北の丸公園. I recognised the song he played—I've heard it as a part of taiko performances before. In an unrelated yet closely located incident, some girls were practising a dance.
Later we spent some time at that Starbucks at that crossing in Shibuya 渋谷. You know, where lots of people... cross. And obnoxious foreigners like me take pictures and video of them doing so.