Definition 28.13.1. Let X be a scheme.
Assume X integral. We say X is Japanese if for every x \in X there exists an affine open neighbourhood x \in U \subset X such that the ring \mathcal{O}_ X(U) is Japanese (see Algebra, Definition 10.161.1).
We say X is universally Japanese if for every x \in X there exists an affine open neighbourhood x \in U \subset X such that the ring \mathcal{O}_ X(U) is universally Japanese (see Algebra, Definition 10.162.1).
We say X is Nagata if for every x \in X there exists an affine open neighbourhood x \in U \subset X such that the ring \mathcal{O}_ X(U) is Nagata (see Algebra, Definition 10.162.1).
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