本人打算去日本，東京好定北海道好？

I will suggest you to goto Hokaido as I refresh my memory taht it was snowing at the end of Novenmber and it was very romantic.
You can aslo visit the canal and eat the Long legs crab there. The people there will be much nice than in Tokyo.
Join the package from cathay pacific and the price is OK, at least it is direct flight from HK to there.

如果想Shopping ,玩主題樂園,玩機動遊戲去東京
如果想看雪景,風景,吃海產去北海道