na-adjective
Describes a person, thought, or analysis that lacks depth and only considers the surface. Often used critically.
彼の意見は皮相的で、問題の本質を捉えていない。
His opinion is superficial and doesn't grasp the essence of the problem.
皮相的な見方に惑わされない
Don't be misled by a shallow perspective.
浅い is a more common and versatile word for 'shallow' (e.g., water, knowledge), whereas 皮相的 is a formal, abstract term used mainly for intellectual or analytical shallowness.
From 皮相 (ひそう, 'surface appearance') + 的 (てき, '-like'). 皮相 is composed of 皮 (skin/surface) and 相 (aspect/appearance).