noun
rice from three years ago
Specifically refers to rice harvested three years prior, older than 古米 (one year) and 古古米 (two years). Used in contexts discussing rice quality, aging, or stock rotation.
See also: 古米
古古古米はさらに熟成が進み、独特の風味があると言われる。
Rice from three years ago is said to have matured further and developed a unique flavor.
古米 is rice from the previous year's harvest, while 古古古米 is from three years ago.
古古米 is rice from two years ago, one year fresher than 古古古米.
Compound of 古 (old) repeated three times + 米 (rice), literally 'old-old-old rice', indicating rice from three harvests ago.