The ancient Japanese practices of using Rokuyō and the lunar calendar are deeply rooted in the country’s culture and way of life, especially in agriculture. Rokuyō, consisting of six days (Taian, Shakkō, Senshō, Tomobiki, Senbu, and Butsumetsu), indicates the fortune of each day. In contrast, the lunar calendar, based on the phases of the moon, played a significant role in agricultural activities.

Japanese Agriculture in Harmony with Nature
Japanese agriculture is closely connected to the rhythms of nature. Major farming activities such as planting and harvesting were influenced not only by climate and weather but also by the phases of the moon and the auspicious days of Rokuyō. For instance, Taian, considered an auspicious day for starting new endeavors, was often chosen for important agricultural tasks like planting and harvesting.

The Close Relationship between the Lunar Calendar and Agriculture
The lunar calendar was extremely useful for determining the timing of agricultural activities. The phases of the moon, according to the lunar calendar, also affect tides and the behavior of flora and fauna. In agriculture, especially in rice cultivation, this connection was crucial. Water management in rice fields is delicate, and by adjusting the timing of water irrigation and drainage according to the lunar phases, farmers could optimize crop growth.

The new moon and full moon were widely used as markers for scheduling agricultural tasks. Farmers would plant seeds and transplant during the new moon and harvest during the full moon. This practice was based on the belief that the moon’s gravitational pull influences plant growth, particularly evident in the harvesting of root crops.

Agricultural Festivals and Local Traditions
Rokuyō and the lunar calendar were also closely related to agricultural festivals and local traditional events. For example, rice-planting festivals and harvest festivals, dedicated to agricultural deities, were often held on auspicious days of Rokuyō or significant lunar calendar dates. These events allowed farmers to pray for a successful agricultural year and express gratitude.

Furthermore, the 24 solar terms based on the lunar calendar were important indicators in Japanese agriculture. These solar terms, such as Risshun (beginning of spring), Koku (grain rain), and Shōman (lesser fullness), provided guidelines for agricultural timing. This enabled farmers to carry out appropriate agricultural tasks in harmony with seasonal changes.

Reviving Traditional Wisdom in Modern Times
During the Edo period, agricultural calendars based on Rokuyō and the lunar calendar were widely disseminated, and farmers used them as references for their activities. For instance, agricultural books from the Edo period detailed schedules for farming tasks based on the lunar calendar and Rokuyō, allowing farmers to practice efficient farming.

However, after the Meiji Restoration, Japan adopted the Western solar calendar (Gregorian calendar), and Rokuyō and the lunar calendar were no longer officially used. Despite this, traditional agricultural practices based on these calendars persisted in rural areas, and their influence remains evident even today. Especially in traditional agricultural events and regional festivals, Rokuyō and the lunar calendar still play an important role.

A Message for Modern Agriculture
Even today, it is important to cherish the wisdom of living in harmony with nature and pass it on to future generations. The knowledge of Rokuyō and the lunar calendar is not merely a relic of the past but provides useful insights for modern agriculture. By integrating scientific advancements with respect for natural rhythms, future agriculture can be sustainable and prosperous.

I encourage everyone to revisit the wisdom of Rokuyō and the lunar calendar and incorporate it into daily life and agricultural activities. By passing on this traditional knowledge to the next generation, we can collectively build a brighter future for our culture and agriculture.

I hope this article resonates with you and is widely shared. Let’s embrace and practice the wisdom of living in harmony with nature.