The C51-class Pacific (4-6-2) was the first true express passenger locomotive built in Japan. Nearly 300 locomotives were built from 1919 to 1928 by Kisha Seizo, Mitsubishi, and the Hamamatsu Workshop. With their 5'9" driving wheels, the C51s could do 100 kilometers/hour, and inaugurated high-speed rail in Japan by pulling the Tsubame Express from Tokyo to Kobe in 9 hours. The oldest survivor, C51.5, was built in 1920 (most likely by Hamamatsu) and is now preserved at the Saitama Railway Museum. Note the hinges toward the front of the smoke deflector so that the deflectors can be folded back to inspect and repair the locomotive, which is a rather clever touch on this well-designed locomotive.