noun
A deciduous tree native to Japan, Fagus japonica. Often contrasted with ブナ (Fagus crenata).
See also: ブナ
イヌブナはブナよりも葉が細長い。
The Japanese beech has longer and narrower leaves than the Siebold's beech.
Refers to the Siebold's beech (Fagus crenata), a closely related species. イヌブナ is sometimes considered less valuable or 'inferior' compared to ブナ, as suggested by the prefix イヌ (dog).
From イヌ (inu, 'dog') + ブナ (buna, 'beech'), likely implying a 'false' or 'inferior' beech compared to the more valued ブナ.