Ah, because it’s an island arc formed by a subduction zone? Duh...
Correct. The Indonesian Archipelago is the same way, and so is off the west coast of North America from Eureka, CA all the way to the north end of Vancouver Island.
The Pacific Northwest is also sitting on top of a subduction zone with many associated volcanoes and long ago portions were island chains but the three major plates are neither that constantly active or complex. New Zealand is more similar. Indonesia is even far more complex and more active/violent.