UPDATE, 12/13/13, 1:00 p.m. EST: The names of Skadden attorneys advising Sumitomo Mitsui have been added to this article’s final paragraph.

Tokyo’s Sumitomo Mitsui Banking Corporation said Thursday it has agreed to acquire Flagship Rail Services, a Chicago-based railcar leasing business, from an arm of investment firm Perella Weinberg Partners in a deal worth $1.1 billion.