Not every job in Octopath Traveler 2 will use JP to learn new skills. Some may have other requirements. The Inventor, a job you get from Arkar is one of them. It involves collecting and reporting.

Fully upgrade your Inventor with these rare item locations. To unlock the true power of the Inventor job in Octopath Traveler 2, you’ll need to search the continent for rare items. Some of these items ...