From the Tamiya website:
NYK Line is one of the largest shipping companies in the world and Tamiya now adds a variant of the 40-foot container semi-trailer with NYK colors to the 1/14 scale Tractor Truck Series line-up. ABS front, top, and side panels each have their own distinctive panel patterns. 3-axle semi-trailer features metal leaf-springs, friction dampers, and axle-supporting suspension arms. Twist-Lock System enables realistic container attachment/detachment even after completion.