In "Shugaisho," there is an explanation that gasshokin (bad combination of foodstuffs) (examples of prohibited food combinations) applies to the combination between buckwheat and boar or lamb but there are no scientific grounds to support that claim.
蕎麦とイノシシ・ヒツジの肉との合食禁（食い合わせを禁ずる例）を解説しているが、今日における科学的根拠は無い。