Here is the most popular Christmas song in Japan.
This song is sung by Tatsuro Yamashita.
Since this song is famous for the TV commercial of JR Tokai, which is the train company, everyone knows it! If you are walking around the street in Tokyo around Christmas time, you will hear this song all the time. As you see in this TV commercial, in Japan, Christmas day is the day when lovers spend time together. Most of the hotel rooms in Tokyo are booked by couples, and it is a lonely day for a single person.
JR Tokai CM --- Christmas Express
