regional/japan/metadata.json

{
  "region": "japan",
  "name": "Japan",
  "group": "asia",
  "group_display": "Asia",
  "group_order": 1,
  "realm": "palearctic",
  "classes": 577,
  "size_mb": 140.9,
  "countries": {
    "core": [
      "Japan",
      "South Korea"
    ],
    "partial": [
      "China",
      "North Korea",
      "Russia"
    ]
  },
  "validated_max_diff_vs_global": 1.0836811270564795e-07
}