Flower-Shaped Platform

A Buddhist altar dated to the year 1312

Most medieval ritual furniture in Japan can only be placed within a span of decades. The Hanagata Daidan is an exception. Carved into it is an inscription giving the tenth month of the first year of the Shōwa era, a reckoning that corresponds to the year 1312, late in the Kamakura period. That single line fixes the altar to a precise year and turns it into one of the reference points by which other esoteric altars are dated.

The piece belongs to Kongōbu-ji, the head temple of Kōyasan Shingon Buddhism, and is kept on the mountain at the Reihōkan in Wakayama Prefecture. Its name translates as "flower-shaped great altar," and the description is literal. This is not a plain wooden box but a low platform whose form is worked into lotus petals.

What a daidan is for

In Shingon Buddhism, the esoteric school Kūkai brought to Japan in the ninth century, a daidan is the central working surface of a rite. It is the table on which the officiating priest lays out the implements that make a ceremony possible, and it sits at the heart of the ritual space rather than against a wall.

A mandala in this tradition is not only an image painted on silk. It can be assembled in three dimensions on a flat surface. During a rite the four corners of the altar are marked by short posts called ketsu, and five-colored cords are strung between them to enclose a sacred precinct. Inside that boundary the priest arranges a censer at the center, rows of small vessels for offerings of water and scented flowers, flower vases toward the corners, and a tray holding a bell and a five-pronged vajra, the ritual implement that stands for indestructible wisdom.

What makes the daidan distinctive is that the same arrangement is repeated on all four sides. The altar reads identically whichever direction you approach it from, which is why it is described as "four-faced." Seen this way, the Hanagata Daidan is less a piece of furniture than a stage on which an entire cosmos is set out and then entered.

Why it matters

The Agency for Cultural Affairs designated the altar an Important Cultural Property on 25 April 1968, classifying it among craft works rather than sculpture or painting. The reasons are partly art-historical and partly documentary.

Dated medieval altars are uncommon. Wooden ritual furniture was handled constantly, exposed to incense smoke and candle heat, and replaced when it wore out, so survivals from the early fourteenth century are already rare. An object that also carries a legible year is rarer still. Because the 1312 inscription is secure, scholars can compare the proportions and carving of undated altars against it, which gives the piece a value beyond its own beauty.

It also speaks to the material side of esoteric practice at its source. Kōyasan was the place where Shingon ritual was codified and taught, and an altar made for use there carries the authority of that lineage.

What to look for

The flower in the woodwork

The name points to the carving. Rather than a square block, the altar is shaped with petal forms around its body, a treatment seen on a small group of related Kamakura altars. On comparable pieces the petal tips curl back with a vigor typical of the period, and it is this carved profile, more than any applied decoration, that gives the type its name. Standing close, the eye follows the rhythm of the petals around all four sides.

A mandala you can circle

If you have only seen mandalas hanging as paintings, the altar reframes the idea. Here the diagram is horizontal and three-dimensional, a flat plan of the Buddhist universe laid out at waist height. The repetition on every face means the symmetry is not decorative but doctrinal: each direction is a doorway into the same enlightened world.

A date you can read

The inscription is the quiet centerpiece. A line of characters recording a month and a year is easy to walk past, yet it is the reason this altar, rather than a finer-looking undated one, became a designated property. It is worth pausing on the fact that a craftsman in 1312 marked the year, and that the mark still does its work seven centuries later.

Seeing it on the mountain

The altar is housed at the Kōyasan Reihōkan, the museum that holds most of the mountain's designated craft works and is sometimes called the Shōsōin of Kōyasan for the depth of its collection. The building stands a short walk southeast of the Danjō Garan, the temple precinct Kūkai laid out first.

One thing to understand before you travel: the Reihōkan rotates its holdings through seasonal and special exhibitions, and National Treasures and Important Cultural Properties are not all on view at once. The Hanagata Daidan may or may not be displayed during a given visit, so it is sensible to check the current exhibition before counting on seeing it. The museum opens daily except over the New Year, from 8:30 a.m. to 5:30 p.m. between May and October and to 5:00 p.m. from November through April, with last entry half an hour before closing. General admission is 1,300 yen, with reduced rates for students. The nearest stop is Reihōkan-mae on the Nankai Rinkan bus.

Around Kōyasan

Kōyasan rewards a slow day. The Danjō Garan, beside the museum, centers on the vermilion Konpon Daitō, a great pagoda that renders the two esoteric mandalas as a single architectural space, alongside the Kondō main hall and the elegant Miedō. A walk west reaches Kongōbu-ji's main buildings, while in the opposite direction the approach to Okunoin leads through a cedar forest dense with memorial stones to the place where Kūkai is said to rest in eternal meditation.

The whole mountain was inscribed on the UNESCO World Heritage list in 2004 as part of the Sacred Sites and Pilgrimage Routes in the Kii Mountain Range, so the altar sits within a landscape that is itself protected.