How to Upgrade Tools in Harvest Moon: Light of Hope

How to Upgrade Tools in Harvest Moon: Light of Hope? Perhaps that's question crossed your mind when playing this game. Because it's very important to know. The purpose of upgrading your tools is to enhance the performance of the tool. For example, a hoe is initially only able to till 1 square of land, but after the upgrade, you can till 3 to 15 of land when holding down the action button.