禅の悟りと白隠：今に響く覚醒の道Zen Satori and Hakuin: A Path to Awakening That Resonates Today

In this article, we explore how Hakuin Ekaku (白隠慧鶴), the Zen monk who carried Zen in Japan out of stagnation, ultimately completed his enlightenment.

Hakuin Ekaku (1686–1769), a profoundly influential Zen monk of the mid-Edo period, is regarded as the restorer of the Rinzai school. Originally, Rinzai Zen was one of the five houses of Chan Buddhism in China—comprising Linji (Rinzai), Guiyang, Caodong (Soto), Yunmen, and Fayan—and its influence extended across Japan, China, Taiwan, and Korea.

The Rinzai school was founded by the Tang Dynasty Chan master Linji Yixuan (?-867). In Japan, Rinzai Zen flourished primarily during the Kamakura period (1185-1333), largely due to the efforts of the Zen monk Eisai (1141–1215), whom I introduced in a previous article. Eisai traveled to the Song Dynasty, where he was deeply impressed by the tea culture practiced by Chan monks. He later introduced both Zen and tea culture to Japan.

As Zen Buddhism developed in Japan, it became organized into five major schools: Rinzai, Soto, Japanese Daruma, Obaku, and Fuke. Over time, Rinzai Zen split into 14 different sub-schools. Even today, it is estimated that Rinzai Zen has approximately 1.98 million followers in Japan.

Rinzai Zen maintained a close relationship with the samurai governments of the Kamakura and Muromachi periods (1336-1573), whereas Soto Zen spread more widely among rural communities and commoners. During the Kamakura and Muromachi eras, Rinzai Zen wielded immense cultural and political influence. However, its dominance declined rapidly when the Ashikaga clan, the founders of the Muromachi shogunate, were overthrown by Oda Nobunaga.

After this decline, Rinzai Zen lost its power for some time, but it experienced a revival in the Edo period. The key figure behind this resurgence was none other than Hakuin.

However, Hakuin was not enlightened from the beginning. In his youth, he boasted, “In the past five hundred years, no one in the world has carried enlightenment as thoroughly as I have.” He was extremely proud and possessed a strong sense of superiority. He traveled across the country, engaging in fierce debates with monks and scholars, defeating them in arguments, and indulging in his own arrogance.

At the height of his conceit, Hakuin heard of an extraordinary Zen master. This individual was said to be living in seclusion in Shinshu (modern-day Nagano Prefecture). Intrigued, Hakuin immediately set off to meet him. This master was none other than Shoju Rojin (Dokyo Etan).

Upon meeting Shoju, Hakuin attempted to challenge him in debate, as he had done with others before. However, Shoju shattered Hakuin’s arrogance with a single remark:

“You have only attained gakutokutei (学得底), the knowledge gained through learning. But if you truly claim to have awakened, bring me kensho-tei (見性底), the realization of your true nature.”

To explain this in modern terms, “gakutokutei” refers to the accumulation of intellectual knowledge—such as linguistic proficiency, expertise in social issues, or academic understanding of labor problems. This is a common trait among so-called intellectuals. However, Shoju saw this attitude as the real problem. Those who cling to “gakutokutei” believe themselves to be superior, and society often reinforces this illusion of superiority.

On the other hand, “kensho-tei” means elevating knowledge into wisdom that purifies one’s life. It is not about possessing knowledge for its own sake but about using it to unify one’s scattered thoughts and return to one’s true self.

This critique remains relevant even today. Many contemporary intellectuals should reflect on Shoju’s words. After all, mere intellectual superiority is one of the most despised traits in both Chinese and Japanese thought.

Struck by Shoju’s words, Hakuin underwent a profound awakening. He chose to become Shoju’s disciple and devoted himself to the rigorous path of Zen practice.

During his training, Hakuin experienced a breakthrough when an old woman beat him with a broom. However, he later encountered another obstacle—he became obsessed with excessive ascetic practice, which led to a severe physical and mental breakdown. Later, he would refer to this condition as “Zen sickness”.

This phenomenon is not unique to Hakuin. Even today, many practitioners of Zen, especially those who came to it through D.T. Suzuki, experience a similar crisis when they immerse themselves too deeply in Zen without proper guidance.

At this crucial moment, Hakuin encountered a mysterious hermit known as Hakuyushi, who lived in a cave deep in the mountains of Kyoto. Legend has it that Hakuyushi had lived for several hundred years. Recognizing Hakuin’s distress, he taught him a secret method that allowed him to recover from Zen sickness. Under Hakuyushi’s guidance, Hakuin not only restored his health but also deepened his understanding of spiritual practice by studying not just Buddhist texts but also Confucian classics such as the Doctrine of the Mean, the Laozi, and the Diamond Sutra.

Hakuin continued his rigorous practice, and at the age of 42, he finally attained full satori (悟り, enlightenment) upon hearing the sound of a cricket’s chirping.

It is said that Confucius once declared, “At forty, I knew my destiny. (四十にして天命を知る)” Similarly, Hakuin, after decades of struggle, finally realized his true nature in his forties.