I think, it’s「努力は報われる」

Well, I know of 1 quote that is very longue and is a tongue twister too! It has a similar meaning too "Hard Work Will Pay Off" =>なせばなるなさねば成らぬ何事も、成らぬは人の為さぬなりけり It has a similar meaning too "Where there is a will, there is a way." Hope my answer was helpful too.. がんばってね...m(^v^)m

七転び八起き　（ななころびやおき）　 http://quotations.about.com/od/stillmorefamouspeople/a/Japaneseprover1.htm 継続は力なり　（けいぞくはちからなり）　 勝って兜の緒を締めよ　（かってかぶとのおをしめよ） http://www.litera.co.uk/japanese_proverb_on_excellence/