Routing from the Outside In

match 'こんにちは' => 'welcome#index' #neat from

While you should usually use resourceful routing, there are still many places where the simpler routing is more appropriate. There’s no need to try to shoehorn every last piece of your application into a resourceful framework if that’s not a good fit.

Full article: http://edgeguides.rubyonrails.org/routing.html