There are high mountains running through the main island of Japan from north to south, so the climate is different on the sea of Japan side and the pacific side.
この場合、次のような言い方ができますよ。
ーThere are high mountains running through the main island of Japan from north to south, so the climate is different on the Sea of Japan side and the Pacific side.
「日本の本州の南北に高い山々が連なっているので、日本海側と太平洋側の気候は異なる」
high mountains running through the main island of Japan from north to south と言うことで高い山々が本州を縦断していることが言えます。
ご参考まで!