also: としよりめいせき
sumo elder stock; toshiyori myoseki
Sumo-specific term for the 105 permanent, heritable elder names (plus a few single-generation names for certain yokozuna) that are required to obtain a coaching license and run a stable.
See also: 年寄り
To acquire sumo elder stock, a certain level of achievement during one's active career is required.
After retiring, he inherited a toshiyori myoseki and took over the stable.
年寄 is the general term for a sumo elder; 年寄名跡 specifically refers to the hereditary name and license itself.
Standard kanji spelling; the reading としよりみょうせき is the most common.
Alternate reading としよりめいせき is less common but attested.
年寄 (toshiyori, 'elder') + 名跡 (myōseki, 'hereditary name'). The term is deeply rooted in sumo tradition, where these names are passed down through generations.