I’ve gone yukigassen snowball fighting in Hokkaido.
I've arrived in Hokkaido! Time to eat some real sushi!
Speaking of Hokkaido souvenirs, what’s famous?
The north sea road is the road you take to get to the northern sea. That is an area of Japan, actually. That area is known as Hokkaido. It's a very nice place, be sure to visit it if you can for some of the freshest seafood around.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own. The ほく does get shortened though, so be careful!