What country is kava from?

Could you please elaborate on the origin of kava? I'm particularly interested in knowing which country it originates from. Could you possibly provide some insights into its cultural significance and perhaps any traditional uses associated with this fascinating plant? Additionally, I'm also curious about its popularity and availability in the modern world, specifically whether it's widely consumed or limited to certain regions. Could you share any further details regarding these aspects? Thank you for your assistance in answering my inquiry.