Can you go to the Nintendo eshop without a router at home. Just with a modem?

Yes, you can access the Nintendo eShop using a modem without a router, provided that your console is directly connected to the modem via an Ethernet cable or a compatible Wi-Fi connection. However, ensure that your modem is connected to the internet, as this is necessary for online access. Keep in mind that some features, such as multiple device connections, may not be available without a router.