継続は力なり。 Keizoku wa chikara nari. Translation: Perseverance is strength. English equivalent: Persevere and never fear. ポケット図解ドラッカー経営のツボがよーくわかる本:. 秀和システム. 2008. p. 37. ISBN 4798020680.
Eggs and oaths are soon broken. Note: Specified as a Japanese proverb in the source. Stone (2006). Routledge Dictionary of World Proverbs. Taylor \& Francis. p. 310. http://en.wikiquote.org/wiki/Japanese_proverbs