The 2-4-0 locomotive known as "Steam Locomotive Number 1", which hauled the first revenue-earning train to run in Japan in 1872, preserved in JR East's railway museum a little to the north of Tokyo.
locomotive-no-1 by Rail Squid, on Flickr
locomotive-no-1-plate by Rail Squid, on Flickr
Also available in model form (N gauge but not quite N scale I believe):
steam-locomotive-no-1-p1 by Rail Squid, on Flickr