Saneatsu Mushanokoji is deeply affected by Tolstoy in the formation of his main thinking. Tolstoy’s impact on Mushanokoji cannot be minimized although their main thinking shows some differences. Being inspired by Tolstoy, Mushanokoji realizes the importance of man’s worth, human love and genuine happiness gained by acting upon one’s conscience. In his lifetime, Mushanokoji upholds Tolstoy’s concept that the true meaning of life results from mental peace and happiness that are beneficial to man’s conscience and mental growth. Due to his influence by Tolstoy, Mushanokoji wishes to be a great humanist for the good of mankind’s mental growth. In fact, Mushanokoji’s brilliant and remarkable performance in the literary world is well-known as a lifetime mental reformist and educator. The above reasons make me deal with the subject of “Mushanokoji’s Main Thinking and Tolstoy” in this article.