These are each along one of the routes for the six World Marathon Majors very near a mile marker. Putting them in the order of the Marathon Majors produces:
- 飯田橋二丁目店 - Tokyo mile 4
- 120 W Central St Natick - Boston mile 9
- 20 The Highway, Whitechapel - London mile 22
- Prinzenstraße 85 - Berlin mile 9
- 1260 West Adams St - Chicago mile 14
- 414 4th Ave - New York mile 7
Conveniently enough, there are 26 miles markers in a marathon. Converting to letters yields the answer, DIVING.