Which part of the ginkgo seed is eaten in China and Japan?

In China and Japan, the part of the ginkgo seed that is consumed is the large, inner nutlike portion.1

While the seed consists of this inner nut surrounded by a fleshy outer covering, the latter is known for having a very disagreeable odor, often compared to rancid butter. The inner nut, sometimes referred to as a ginkgo nut, is typically roasted and considered a delicacy in these regions.12