EasyConfidence: 0.95
Way of the Key Master
Open five coin lockers.
Global unlock
51.6%
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What to do next
SourcePick up at least five coin locker keys scattered around Kamurocho and open five lockers.
There are 100 lockers in total above and below ground, so start with whichever are closest.
Five is enough, though there is no harm in collecting the rest.