Yahoo! JAPAN services are no longer available in the Netherlands
As already announced by Yahoo! JAPAN on February 1, their services are no longer available from European Union member states including the Netherlands and the United Kingdom.
Yahoo! JAPAN is a representative portal site in Japan, and many Japanese living in Europe also use it. I don't usually use it so it's okay, but it seems that we can still access Yahoo! JAPAN by using a VPN connection.
For example, my acquaintance says he can continue to use Yahoo! JAPAN using a free service called ProtonVPN.