After you improve your hammer and hoe, it remains to deal with the upgrade for the ax. In this guide, we will tell you how to get it: what tasks you need to complete in order to unlock the possibility of upgrading the tool to a metal axe.
All of Summer in Mara's main tools can be upgraded to metal modifications. Some are available at the start of the game, but others require more progress to be made before the recipes are unlocked. A metal ax will allow you to chop rarer trees and get more resources and wood.
The process is lengthy. When you arrive on Calis, focus on the tasks of Koa, the old woman from the lighthouse. If her quests are not available, follow Pilli's quest from the market. Then you will need to complete the tasks of other NPCs in order to subsequently continue the Koa and Pilli chains.
In the end, the old lady from the lighthouse will ask you to repair the radio. Visit the blacksmith, who will send you to Pilli for batteries. Don't buy them! Instead, just talk to Pilli. She will ask you to drop something into the ocean. Once you've done that, go back for the batteries. You will receive them to complete the quest. After that, you will be given a recipe for a metal axe.