A Local Perspective on Life in Tsukuba, Ibaraki, Japan.

A Look at Moon-Viewing ( O-Tsukimi, お月見) in Japan- this year`s Harvest Moon can be seen on October 1st ー weather permitting

The full moon of mid-autumn (chushu no meigetsu , 仲秋名月) with pampas grass (susuki)

The full moon of mid-autumn (chushu no meigetsu , 仲秋名月) with pampas grass (susuki)

By Avi Landau

When they followed their traditional LUNISOLAR calendar, now referred to as the kyu-reki (旧暦, former calendar) or inreki (陰暦), the Japanese were always in tune with the MOON and its PHASES. In fact, under that old system of ordering the days, months and seasons  ( first introduced to Japan from Tang China via  Korea sometime in the mid- 6th century), the days of the month were directly connected to the moons waxing and waning. Thus, it was possible on many specific dates to predict the shape that the moon would take in the sky on that particular night. Most famously, the FULL MOON (満月、mangetsu) would almost always appear on the night of the 15th (ju-go-ya, 十五夜) of each month ( In 2020 this will fall on October).


A moon-viewing altar set up at the International Conference Center in Tsukuba (2013)

A moon-viewing altar set up at the International Conference Center in Tsukuba


Since the Japanese government of the Meiji Period ( a time of rabid Westernization and modernization) decided to drop this old lunisolar calendar  in favor of the solar based Gregorian one( in 1873), consciousness of the moon and its cycle  has been ON THE WANE, as the dates of the NEW CALENDAR no longer coincide with the lunar phases. Thus, even though some modern Japanese calendars DO show the KOYOMI dates (in hard to notice, small print) , it is still easy to lose track of when important traditional ceremonies  are coming up.


It is ironic that  it is now CONVENIENCE STORES (an institution which can be said to bear great responsibility in the precipitous demise of traditional lifestyles and family relationships), which help remind the general public about the coming of one of Japan`s MOST ANCIENT AND ENDEARING CUSTOMS-  O-Tsukimi ( お月見, Moon-Viewing). They do this by setting up displays ( which look charmingly home-made) featuring the iconic symbols of the event-  moons and rabbits ( according to Japanese and Chinese legend,  there is a rabbit on the moon!), Tsukimi-Dango ( moon shaped rice dumplings) and Chinese moon cakes, as well as stalks of real pampas grass (susuki, 薄).

Tsukimi dango and pampas grass (susuki) at a convenience store in Tsukuba

Rabbit-motifed sweets on sale during the Moon-Viewing season


Though the moon`s beauty can be appreciated at any time of year, in Japan doing so is strongly connected with AUTUMN. In fact , in Haiku poetry the word moon- TSUKI (月), by itself , is a keyword indicating the fall. This is not only because at that time of year temperatures and weather conditions are at their most suitable  for such outdoor activity at night, but also because, in the northern hemisphere, the moon seems to be especially large and NEAR to us during the autumn months.

Moon-viewing altar at a restaurant inTsukuba (September 2015)

Moon-viewing altar at a restaurant in Tsukuba

For the Japanese, whose culture is so connected to the changing of the seasons and the appreciation of natural beauty, viewing this autumn moon ( the Harvest Moon, in English) came to be one of the most cherished and anticipated activities of the year!. There was (is) even the saying- HARU WA HANA- AKI WA TSUKI- in spring cherry blossoms, in autumn the moon! Countless works of art, especially in poetry and painting  focused on the moon as its major motif, suggesting not only beauty, but continuous change, and even revival. Here is one very famous ( and anonymous) classical poem which expresses the SPECIAL  joy of viewing  the moon in mid-autumn:

Tsukizuki ni tsuki miru tsuki wa oo keredo tsuki miru tsuki wa kono tsuki no tsuki ( 月々に月見る月は多けれど月見る月はこの月の月) , which I translate, using the word moon to mean both MONTH and MOON, as it does in Japanese-

Moon after moon  there are so many moons to be viewed, but as for   a MOON-VIEWING moon there is none other than this moon`s moon!

According to the traditional calendar, the months of autumn are the 7th, 8th and 9th, months. These roughly correspond to the Gregorian late August, September, October and early November. The custom of viewing the mid-autumn full moon (仲秋名月, chu-shu-meigetsu),  which appears in the sky on the 15th day of 8th month (sometime in September or October according to the new calendar) while eating , drinking and  composing and reciting poetry, was introduced to Japan from China. The oldest record of such a formal Chinese- style Moon-Viewing party held by the Japanese Imperial Court dates back to the year 856 ( the third year of the Emperor Saikou). However, many scholars believe that the Japanese people had been making offerings to the moon, in order to pray for or give thanks for a good harvest, since LONG BEFORE the Chinese style celebrations were introduced.

The reason for assuming this, is that among the common people ( and later for anyone doing  Tsuki-Mi), it was (and still is) the custom  to offer SATO-IMO (里芋), taro,  to the moon in this season , as part of a general rite of prayer called the HATSUHO-MATSURI (初穂祭り, Festival of the First Harvest). In fact, an alternate name for the mid-autumn full moon is the TARO-FULL-MOON (IMO-MEIGETSU. 芋名月), which might just very well be a LIVING CONNECTION with Japans prehistoric, pre-rice cultivating past, when the taro was the staple food of the inhabitants of these islands.

Taro and tsukimi dango (rice dumplings) being offered to the moon


Another indication that there was a native Japanese version of the Chinese custom of moon-viewing is the fact that in Japan, it is considered incomplete, or even UNLUCKY to do TSUKI-MI only on the 15th day of the 8th month ( the day the Chinese do it)- which is tonight! Doing so is called KATAMI-TSUKI (片見月), literally, a half-viewed moon. For a full and satisfactory TSUKI-MI one also had to view the moon and make offerings  on the 13th DAY OF THE 9th MONTH ( called- Ju-san-ya, 十三夜). It is possible that before the Chinese custom of formal moon-viewing was introduced that the Japanese had a similar custom, involving offerings and supplications to the moon, which took place about one month later. It has also been  suggested by commentators, that the shape of the moon on the 13th ( 十三夜), not quite, but  just nearly full, is more appealing to the aesthetic sensibilities of the Japanese!

Anyway, no matter what the origins, people continue to do tsukimi to this day. Whereas the Chinese have a national holiday and celebrate by eating large, round moon cakes ( to symbolize family unity), the Japanese make offerings to the moon ( by leaving them in a place exposed to the moon-light) of seasonal crops ( chestnuts, persimmons, taro, apples), seasonal plants ( bush clover, etc.) and little round rice dumplings called Tsuki-mi dango. Usually 15 ( for the 15th night) or 12 ( for 12 months of the year) of these dango are placed in a traditional tray called a SANBO (三方) . One very  interesting folk belief related to these dango is that your family will have good luck ( and a good harvest) if these little sweets are stolen from your offering tray! Thus, moon-viewing night was an exciting time for kids, who would be permitted, or even encouraged, to steal the neighbors dango. These kids were (are ) called O-Tsuki-Mi Dorobo ( お月見泥棒)。

An essential element for any Tsukimi event is some pampas grass. One thing that stands out in my memory is that every year at moon viewing time, the 7-11 near Doho Park, in Tsukuba, gives out free susuki to any one who wanted it .

A display for moon-viewing sweets at a Tsukuba supermarket (2017)

A display for moon-viewing sweets at a Tsukuba supermarket

The significance of this plant is not only its being emblematic of the season. It also resembles rice stalks (though much larger, they are a member of the same family), and thus, moon viewing offerings symbolically connect the old slash and burn agriculture of prehistoric Japan ( the taro) with the culture of rice ( by the presence of susuki and the rice dumplings, in former times the real rice would not have been harvested yet). Susuki also has prickly leaves and stems on its leaves and is sharp where it is cut off, making it useful for symbolically driving away evil.

Most importantly, the stalks act as YORISHIRO (依代), antennae which attract the spirit of the moon to the offerings ( at New Years Kadomatsu, bamboo and pine decorations, are yorishiro- and on childrens day the poles of the carp streamers (Koi nobori) originally had the same function.

A few years ago  the night of the full moon coincided with the great  Tsuchiura fireworks event. As I watched from the HANABI (fireworks) from afar, I was lucky enough to be able to occasionally see the mid-autumn moon whenever the clouds presented an opening. The people around me were all alternately viewing the Hanabi and the moon. It is hard to say which was more entrancing.

If the moon can fill modern man( for whom it is merely a PIECE OF ROCK orbiting around the Earth), with such wonder, imagine how mysterious and even awesome it was to those who had no scientific explanation for it.

Besides providing precious light at night, the Japanese realized that the moon did have an influence on the world around them, the tides, the activities of animals (sea turtles lay their eggs on full moon nights), etc. They also felt a strong connection between the moon and womens menstrual cycles and by extension childbirth.

It is because of this that in Japan, besides the autumn moon viewing events, there were regularly held prayer meetings on particular days of the month ( depending on the community). In Tsukuba, such meetings ( O-Koh, お講) are still held on the 19th of the month. Numerous sacred stones attest to the fact that other nights were once popular for holding these  gatherings at which women prayed for easy delivery and family health. Probably the most common of these stones commemorate prayers on the 23rd night  (二十三夜).

A niju sanya stone (二十三夜塔) which indicates that special prayer meetings had once been held during that phase of the moon


You can do O-Tsukimi tonight- JU-GO-YA,  when the moon is truly full. You then have another chance  next month. You too can join the minion of LUNATICS. In fact, the moon-viewing aficionados of old would enjoy not only the  full moon of the 15th, but also, in their uncontrollable anticipation, watch the 14th night moon. This night was called MACHIYOI (待宵), the night of excited expectation! Then after the 15th, day by day, the moon rises a little later and its shape grows more and more cut-off. There are specific names the poets have given to each of these phases of the mid-autumn moon- on the 16th ( of the old calendar) you can view the IZAYOI (十六や),  the 17th the TACHIMACHI-ZUKI (立待月), the 18th the IMACHI-ZUKI (居待月, and so on.

This year the 13th night of the 9th month (ju-san-ya, 十三夜) will fall on October 11th 2019.

Tiny O-Tsukimi decorations at a home in Tsukuba

Last year TsukuBlog reader Hanamizuki sent  this comment describing an interesting custom held in her neighborhood on the night  of O-Tsuki mi:
In my home village in Tsukuba(Toyosato area), there is a traditional kids event at ju-go-ya every year. We usually call it Pon-pon-tsuki.
Elementary school and junior high school boys(now girls also) hold a stick made of rice ears and rope, visit house to house and beat it on the ground making the sound PON PON while chanting the words…
大麦小麦三角畑の蕎麦あたれ oomugi komugi sankaku batake no soba atare
Barley, wheat, buckwheat in the triangle farm we wish for a bumper crop!
豊年だ満作だ ホホイのホイ hounen da mansaku da hohoi-no-hoi
It’s a good harvest and an increase in yield hohoi-no-hoi !
It’ is obviously an event wishing for a good harvest each autumn.
The kids are then given money from each household they visit, and share this among themselves.
(IN THE OLD DAYS they also often stole the offerings of dango, fruits etc. which was a unique custom for that day, as well)
I guess there are few villages in this area which still  hold this traditional event.


  • alice says:

    There is no moon tonight but a typhoon!

  • Avi Landau says:

    Yes Alice, the oncoming storm did put a bit of a crimp on our moon-viewing plans! Instead of taking pictures of all the different Ju-go ya offerings and observing the PON PON TSUKI event in the old neighborhood of Hakke, Tsukuba, it was only the creeky sound of closing metal storm shutters and following the path of the typhoon and the destruction it left in its wake on TV.

    But by chance, I awakened in the middle of the night- at about 3 AM and got out of my futon to check on the state of the storm.
    I went to the front door, opened it, and found right in front of me- due west- the Harvest Moon in all its glory. It seemed blindingly bright until my eyes adjusted to the dark.

    And then tonight- the 16th according to the lunar calendar we can enjoy a nearly perfect moon- one which the Japanese have traditionally called IZAYOI. Go outside now and check it out!

    Have a good night Alice

  • Alice says:

    Thanks Avi for the info. I stepped out to my balcony and there it was – a full moon tonight! Snapped a picture of it.

  • mamoru shimizu says:

    This year 2015.9.28, We were able to welcome so beatiful and larger full moon(because the moon was nearer to the earth), I saw a bigger rabbit was dancing on it!!
    ” Ta Ra Ra ra ra ra USAGI=rabbit’s DANCE” ・・・Song for Children and Senior guys?