noun
wild boar meat; mountain whale (euphemism)
Historical euphemism for wild boar meat, used when eating animal meat was taboo (pre-Meiji). The literal meaning is 'mountain whale'. Today it is a rare, literary, or nostalgic term.
山鯨は、昔、肉食が禁じられていた時代に猪肉を指した言葉だ。
Yamakujira is a word that referred to wild boar meat in the days when eating meat was forbidden.
この地方では今でも猪肉を山
In this region, wild boar meat is still sometimes called yamakujira.