1. Go to CoW Swap, connect your wallet and switch to the Polygon network
2. Select the Polygon token in the Sell field
3. Paste the JPC contract address (can be found on PolygonScan) into the Buy field
4. Type the number of Polygon tokens you want to sell for Japaricoins
5. Confirm the transaction in your Metamask wallet
6. Import the token if not displayed automatically