Operating between 1968 and 1973, much of their work has not been seen since it was made -- but now there is a fresh opportunity to experience it in “Requiem for the Sun: The Art of Mono-ha,” Feb. 25-Apr. 12, 2012, organized by Hirshhorn Museum curator Mika Yoshitake. The title refers to “the attitude of esthetic detachment and renewal of matter in response to the immanent loss of the object as a sun in Japanese postwar art practice,” Yoshitake said.

The artist most associated with this group, Lee Ufan, is Korean, but he was educated in Japan, and, as an outsider, perhaps felt a strong need to make a statement. He wrote essays and books about the intentions of the artists participating in the movement. His retrospective at the Guggenheim Museum last summer was one of my favorite exhibitions in some time. The restraint and tension that manifested in his paintings and sculptures in that show can be seen in his earliest works, which are on view in this exhibition.

Relatum (formerly Phenomena and Perception B) (1969/2012), a square block of stone dropped upon a sheet of glass to produce a web of cracks, was recreated here by Lee. Another piece called Relatum (1974/2012) is a large stone supporting an electrical cord and a light bulb, and on the second floor of the gallery, Lee has bound four beams to a column with heavy rope for Relatum III (a place within a certain situation) (1970/2012). All of these works, using the most rudimentary of materials, are imbued with a power that is hard to describe and even harder to comprehend. There are a number of other pieces by Lee in the show, and his reputation alone will bring attention to his contemporaries.

Much of the Mono-ha work was meant originally to be temporal -- existing only for a moment -- but, they were documented in photographs, and many of the artists have recreated them. That goes for the first official Mono-ha piece, Phase-Mother Earth (1968/2012), by Nobuo Sekine: a cylinder of earth, about eight by eight feet, excavated from the earth and standing neatly to one side of its enormous hole in the gallery’s garden.

Inside the gallery is the artist’s Phase of Nothingness-Water (1969/1994), rectangular and cylindrical black-steel containers, each the size of a dining table, filled with identical amounts of water that read as reflective black surfaces. Not to forget the subtle humor available in much Japanese art, another gallery features Sekine’s Phase-Sponge (1968/2012), a plump cylindrical sponge covered in ivory fabric, about four-feet tall, slightly collapsed by the pressure of a heavy black steel square on its top.

Susumu Koshimizu’s massive granite boulders resting inside containers of fragile paper, and Katsuro Yoshida’s long steel pipe filled with cotton, are charming works which offer juxtapositions of contrary, contrasting materials. Another revelation in the show is Kishio Suga’s Parallel Strata (1969/2012), a rectangular box built of paraffin blocks and containing more stacked blocks of paraffin -- an ethereal structure with an enticing odor, that appears to be melting before our eyes.

The same artist also flattened wooded steps so that the staircase is transformed into a steep ramp covered in thick sand. Also on view in the show are works by Koji Enokura, Noriyuki Haraguchi, Katsuhiko Narita, Jiro Takamatsu, Noboru Takayama and Katsuro Yoshida. Rarely are so many individually revelatory works brought together in a single show.

While the Minimalist, Process and Earthworks art produced in the United States has the confident, unambiguous quality of American language itself, these Mono-ha works display the oblique, mannered politesse of the Japanese, and illuminate the country’s cultural relationship to poetry and the natural world going back many centuries. Elegant and exacting, this work surely manifested a need to reclaim their national culture, and even their identity, after a quarter century of sorrow and self-reproach.

It seems all the more moving given that the exhibition coincides with the one-year anniversary of the terrible earthquake and tsunami in Japan. There has been little opportunity to see this work until recently -- so kudos to the gallery, which will publish a comprehensive catalog in May, 2012.

“Requiem for the Sun: The Art of Mono-ha,” Feb. 25-Apr. 14, 2012, Blum & Poe gallery, 2727 S. La Cienega Boulevard, Los Angeles, Cali. 90034.

HUNTER DROHOJOWSKA-PHILP is the author of Rebels in Paradise: The Los Angeles Art Scene and the 1960s (Henry Holt, 2011).