The 100 series was a Japanese Shinkansen high-speed train type which operated between 1984 and 2012. They were introduced after the 200 series trains, but  types running east of Tokyo were given even numbers and those west of Tokyo odd numbers.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/32038338@N02">Peter Broster</a>
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<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/remedy451/8062065547/">Shinkansen Series 100</a>