Otsukimi – The Japanese Tradition of Admiring the Autumn Moon
- by MaedaYumiko
- 5 min reading time
Otsukimi is the Japanese tradition of admiring the autumn moon. Why is this moon so special? A look at Jūgoya, Jūsanya, the old Japanese calendar, the moon rabbit, and seasonal motifs found in kimono and obi.
Otsukimi – The Japanese Tradition of Admiring the Autumn Moon
September is already coming to an end.
Here in Berlin, we have had a few surprisingly warm days again recently, but the sky and the wind already feel unmistakably autumnal. The leaves are beginning to change colour, and it is once again the time of year when children start collecting the prettiest fallen leaves they can find.
When I think of September in Japan, one of the things that comes to mind is Otsukimi (お月見), the Japanese tradition of admiring the autumn moon.
In my own family, we did not celebrate Otsukimi as a special family event every year. Still, I remember my mother buying mochi or small sweets around this time of year.
As a child, I was also told, “There is a rabbit on the moon, making mochi.” I would look up at the moon and try to find the shape of a rabbit in its darker shadows.
But what exactly is Otsukimi?
Otsukimi literally means “moon viewing” and refers to the traditional Japanese custom of admiring the moon in autumn.
Of course, there is not only one full moon each year. The reason the moon at this particular time of year came to be regarded as especially important in Japan is connected to the old Japanese calendar.
Until the 19th century, Japan used a lunisolar calendar, whose months were based partly on the phases of the moon. In that calendar, the seventh, eighth and ninth months were considered autumn.
The 15th day of the eighth month therefore fell roughly in the middle of autumn. The moon on that night became known as Chūshū no Meigetsu (中秋の名月), meaning the “famous moon of mid-autumn.”
Because it falls on the 15th night, this evening is called Jūgoya (十五夜), literally “the night of the fifteenth.”
What makes Jūgoya special is not that this particular moon is astronomically unique. Rather, over many centuries, a tradition developed of appreciating the moon in the middle of autumn as something especially beautiful.
There are also practical reasons why the autumn moon came to be admired. Compared with summer, the air is often clearer, while the nights are not yet as cold as in winter. The season also coincides with the harvest of many crops.
For this reason, moon viewing gradually became connected with gratitude for the autumn harvest. Traditionally, people may offer Tsukimi dango, small white rice dumplings, susuki pampas grass, and in some regions taro roots.
Another interesting point is that Jūgoya does not always fall on the astronomical full moon.
Because the date in the traditional calendar and the exact astronomical moment of the full moon do not always coincide, they can sometimes fall one or more days apart.
In 2026, this was especially clear: Chūshū no Meigetsu fell on September 25, while the astronomical full moon did not occur until September 27.
So rather than thinking of Jūgoya simply as a “full moon festival,” it may be more accurate to think of it as a night for consciously appreciating the moon in the middle of autumn.
And the Japanese tradition of moon viewing does not end with Jūgoya.
About one month later comes Jūsanya (十三夜), the “night of the thirteenth.” It refers to the 13th day of the ninth month in the old calendar and is considered a moon-viewing custom that developed particularly in Japan.
Because chestnuts and beans were traditionally harvested around this time, this moon is also known as Kuri Meigetsu, the “chestnut moon,” or Mame Meigetsu, the “bean moon.”
Unlike Jūgoya, the moon at Jūsanya is still before the full moon and is therefore not perfectly round. Even so, this slightly incomplete moon has also long been admired as beautiful.
To me, this reflects something very interesting about Japanese aesthetics: beauty does not always have to mean perfection. Something incomplete, fleeting, or in the process of changing can have a beauty of its own.
In 2026, Jūsanya falls on October 23. So although Jūgoya has already passed this year, there is still another opportunity to pause and enjoy the autumn moon.
There is, by the way, no particular tradition of wearing kimono specifically for Otsukimi.
Even so, autumn appears frequently in the motifs of kimono and obi. Moons, susuki grass, rabbits, autumn flowers and colourful autumn leaves are all common motifs used to express the season through textiles.
When I used to work at a kimono shop in Japan, I also saw playful designs featuring rabbits and the moon on more modern kimono and obi. People who wore kimono in everyday life would often choose patterns that matched the season, and I always enjoyed seeing how the changing seasons could be reflected even in the small details of an outfit.
Autumn motifs also appear frequently in my own collection today, especially colourful maple leaves.
In Japan, there is a common expression: Geijutsu no Aki (芸術の秋), “autumn, the season of art.”
When the leaves begin to change, the air becomes clearer, and the moon appears in the evening sky, it is easy to understand why autumn has long been associated with beauty, art and quiet contemplation.
Perhaps on October 23, even here in Berlin, it might be nice to look up at the night sky for a moment and think of this old Japanese autumn tradition.