We are a group of six staying in Shinjuku. What are the must sees? I have researched and notice quite a few pleaces closed around this period. Twin Towers only open Jan 1st, does this mean crowd lines huge? We arrive Dec 28th leave Jan 2nd for Niseko skiing. We would like to go on a day trip on bullet train any sugestions? Do we need to book for New Years Eve. in our group have 4 in age group of 25-30 and 2 in 50's but all energetic. , so want to experience fun places, areas, bars & restaurants. Should we stay mainly around Shinjuku area - want to see Ginza area is it expensive there.