Cultural shock in Japan (for me):
1. No cars or people during working hours, and I mean in the sense where you can cycle in ziz-zag in the middle of the road.
2. Mad rush with alot people and cards after workind hours-Yup, the actual Japan you thought you will see when you arrive in Japan.
3. Japanese can eat alot but still slim (normal Ramen sessions for a person-girl/boy-consist of a bowl of giant size ramen, a bowl of rice and 6 gyoza)
4.They can eat super duper fast, very focus in eating. Gone in 60secs fast