Jusanya: Celebrating Japan’s Unique 13th Night Moon
When travelers think of autumn in Japan, images of fiery red maple leaves and crisp air immediately come to mind. However, for those who look up at the night sky, there is a profound cultural tradition known as Tsukimi (moon viewing). While many are familiar with the famous “Harvest Moon” known as Jugoya (the 15th night), fewer know about its equally important counterpart: Jusanya, the 13th Night Moon.
Occurring approximately one month after the main harvest moon, Jusanya offers a more contemplative, uniquely Japanese experience. It is a time to appreciate the beauty of a moon that is not quite full, embodying the aesthetic of finding perfection in imperfection.
The Origins: A Uniquely Japanese Tradition
While the celebration of the 15th night (Jugoya) was imported from Tang Dynasty China during the Heian period, Jusanya is believed to be an indigenous custom unique to Japan. There is no corresponding festival in China for the 13th night of the ninth lunar month.
Historians trace the formalization of Jusanya back to the Engi era (901–923). It is said that in the year 919, Emperor Uda held a moon-viewing banquet specifically for this night, declaring the moon on the 13th night to be unparalleled in its beauty. unlike the full glory of the 15th night, the 13th moon is slightly waxing, representing a sense of hope and future potential.
Because of its timing later in the autumn season, usually in October on the Gregorian calendar, the skies are often clearer than during the earlier harvest moon, which coincides with the typhoon season. This reliability led to the saying, “The 13th night has no cloudy skies.”
Legends and The “Chestnut Moon”
The lore of Jusanya is deeply tied to the agricultural cycle of ancient Japan. While the 15th night is often associated with the taro harvest, Jusanya coincides with the harvest of chestnuts and beans. Consequently, this moon is affectionately known as Kurimeigetsu (Chestnut Moon) or Mamemeigetsu (Bean Moon).
The Superstition of Kata-tsukimi
Perhaps the most compelling piece of folklore surrounding these moon festivals is the concept of Kata-tsukimi, or “partial moon viewing.” In the Edo period, a superstition developed specifically within the pleasure quarters and eventually spread to the general public. It was believed to be bad luck to view the 15th-night moon but skip the 13th-night moon (or vice versa).
Seeing only one was thought to invite misfortune or leave a romantic relationship incomplete. Therefore, if a person viewed the glorious full moon of Jugoya, they were culturally obligated to return to the same spot a month later to pay respects to the Jusanya moon, completing the cycle and ensuring good fortune for the coming year.
Modern Culture and Celebrations
Today, while the strict superstitions of Kata-tsukimi have faded, the appreciation for Jusanya remains a beloved part of the tea ceremony and traditional arts. The celebration is generally quieter and more intimate than the boisterous festivities of the full moon.
In modern Japanese households and temples, traditional decorations are set out on a veranda or near a window facing the moon:
- Susuki (Pampas Grass): Five to ten stalks of Japanese pampas grass are displayed in a vase, symbolizing the autumn harvest and acting as a charm against evil spirits.
- Tsukimi Dango: Unlike the 15 pyramid-stacked dumplings of the 15th night, Jusanya features 13 rice dumplings. These are simple, white, and slightly sweet.
- Seasonal Offerings: In homage to its alternate names, offerings of chestnuts (kuri) and edamame or soy beans (mame) are placed alongside the dango. Sliced persimmons and grapes are also common.
Traveler’s Tips: How to Experience Jusanya
If you are planning a trip to Japan in autumn (typically mid-to-late October), experiencing Jusanya can be a magical addition to your itinerary. Because the date follows the lunar calendar, it shifts every year, so be sure to check the specific date for the current year.
Where to Go
- Traditional Gardens: Landscape gardens like Kenroku-en in Kanazawa or Sankeien in Yokohama often extend their opening hours for moon-viewing events, illuminating the trees and holding traditional music performances.
- Kyoto Temples: Daikaku-ji Temple in Kyoto is famous for its Osawa Pond moon viewing. While the biggest crowds come for the Harvest Moon, the Jusanya viewing is more serene and atmospheric.
- Tokyo Tower or Skytree: For a modern twist, viewing the moon rise over the urban sprawl offers a stark, beautiful contrast between ancient tradition and futuristic architecture.
Photography Tips
Photographing the moon requires a steady hand. Use a tripod and a telephoto lens. Since the Jusanya moon is not fully round, try to capture the texture of the craters along the terminator line (where light meets shadow) to highlight its unique shape.
Sources & Further Reading
For those interested in delving deeper into the history of Japanese aesthetics and lunar calendars, the following texts and resources are recommended:
- The Tale of Genji (Genji Monogatari): Written by Murasaki Shikibu, this Heian-era masterpiece contains numerous references to courtly moon viewing parties, setting the cultural context for Jusanya.
- Nihon Shoki (The Chronicles of Japan): While it predates the specific Jusanya tradition, it provides essential background on early Japanese astronomy and the importance of nature worship.
- Essays in Idleness (Tsurezuregusa): By Yoshida Kenko. This collection of essays perfectly captures the Japanese aesthetic of wabi-sabi—appreciating the moon that is not fully round or partially hidden by clouds.