noun
domestic timber; domestically produced lumber
Refers to wood or lumber harvested and processed within the country, often contrasted with imported timber (輸入材). Common in forestry, construction, and environmental policy contexts.
この住宅には国産材が使われています。
Domestic timber is used in this house.
国産材の利用を促進する政
Policies are being advanced to promote the use of domestically produced lumber.
Domestic production in general; 国産材 specifically refers to timber/lumber.
Compound of 国産 (domestic production) + 材 (timber, lumber).