Thanks for comments! They are lading a B747 towing bar.In march 2011,JAL japan airlines retiremented last B747.So Niigata Airport lost B747 towing bar and comes B747 are must to bring a towing bar. This B747 came here when september 25 and brought a towing bar then.So,it has to carry back a towing bar. I'm larning English now.So,you maybe hard to read it.Sorry!