Dogen, the founder of Soto Zen Buddhism in Japan, had a profound influence on the development and spread of Zen Buddhism in Japan. His teachings and practices continue to shape the way Zen is practiced and understood in Japan today.

One of the main ways in which Dogen's teachings influenced Zen in Japan was through his emphasis on zazen, or sitting meditation. Dogen believed that zazen was the key to attaining enlightenment and that it should be practiced continuously, both on and off the meditation cushion. This emphasis on zazen as the central practice of Zen has remained a core aspect of Soto Zen in Japan.

Additionally, Dogen's teachings emphasized the importance of direct experience and the rejection of intellectual understanding. He believed that true understanding could only be achieved through direct experience, rather than through studying texts or relying on the words of others. This emphasis on direct experience continues to be a central aspect of Zen practice in Japan.

Furthermore, Dogen's teachings also had a significant impact on the development of monasticism in Zen. He established a strict monastic code for his followers, which included rules for daily life, meditation, and rituals. This code became the basis for the monastic system in Soto Zen and has been passed down through the generations. Dogen's emphasis on monasticism also helped to establish Zen as a distinct and independent tradition within Buddhism in Japan.

In addition to his teachings, Dogen's writings also had a profound influence on Zen in Japan. His most famous work, the Shobogenzo, is a collection of essays and teachings that continue to be studied and revered by Zen practitioners in Japan. His writings helped to clarify and systematize Zen teachings, making them more accessible to a wider audience.

Lastly, Dogen's teachings also had a significant impact on the spread of Zen to the general population in Japan. He emphasized the importance of bringing Zen practice into daily life and encouraged his followers to spread the teachings to the wider community. This helped to make Zen more accessible to people outside of the monastic community and contributed to its popularity and growth in Japan.

In conclusion, Dogen's teachings had a profound and lasting influence on Zen Buddhism in Japan. His emphasis on zazen, direct experience, monasticism, and the integration of Zen into daily life continue to shape the way Zen is practiced and understood in Japan today. His teachings have been passed down through the generations and continue to inspire and guide Zen practitioners in Japan and around the world.