"渤海" meaning in Japanese

{
  "forms": [
    {
      "form": "渤海",
      "head_nr": 1,
      "ruby": [
        [
          "渤",
          "ぼっ"
        ],
        [
          "海",
          "かい"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "Bokkai",
      "head_nr": 1,
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "proper",
        "2": "ぼっかい"
      },
      "expansion": "渤(ぼっ)海(かい) • (Bokkai)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "name",
  "senses": [
    {
      "glosses": [
        "a 7-10th century kingdom located around northern China and Korean; Balhae"
      ],
      "head_nr": 1,
      "id": "en-渤海-ja-name-mLv97Y48",
      "links": [
        [
          "Balhae",
          "Balhae"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "34 1 5 3 30 14 9 3",
          "kind": "other",
          "name": "Pages with 4 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "11 89",
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "10 90",
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "23 77",
          "kind": "other",
          "name": "Japanese terms with 2 kanji",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "9 91",
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "the Bohai Sea"
      ],
      "head_nr": 1,
      "id": "en-渤海-ja-name-~Yiv8i3D",
      "links": [
        [
          "Bohai Sea",
          "Bohai Sea"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[bo̞k̚ka̠i]"
    }
  ],
  "wikipedia": [
    "ja:渤海 (国)",
    "ja:渤海 (海域)"
  ],
  "word": "渤海"
}

{
  "categories": [
    "Japanese entries with incorrect language header",
    "Japanese lemmas",
    "Japanese links with redundant wikilinks",
    "Japanese proper nouns",
    "Japanese terms spelled with hyōgai kanji",
    "Japanese terms spelled with second grade kanji",
    "Japanese terms with 2 kanji",
    "Japanese terms with IPA pronunciation",
    "Japanese terms with IPA pronunciation missing pitch accent",
    "Japanese terms with redundant sortkeys",
    "Pages with 4 entries"
  ],
  "forms": [
    {
      "form": "渤海",
      "head_nr": 1,
      "ruby": [
        [
          "渤",
          "ぼっ"
        ],
        [
          "海",
          "かい"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "Bokkai",
      "head_nr": 1,
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "proper",
        "2": "ぼっかい"
      },
      "expansion": "渤(ぼっ)海(かい) • (Bokkai)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "name",
  "senses": [
    {
      "glosses": [
        "a 7-10th century kingdom located around northern China and Korean; Balhae"
      ],
      "head_nr": 1,
      "links": [
        [
          "Balhae",
          "Balhae"
        ]
      ]
    },
    {
      "glosses": [
        "the Bohai Sea"
      ],
      "head_nr": 1,
      "links": [
        [
          "Bohai Sea",
          "Bohai Sea"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[bo̞k̚ka̠i]"
    }
  ],
  "wikipedia": [
    "ja:渤海 (国)",
    "ja:渤海 (海域)"
  ],
  "word": "渤海"
}

{
  "called_from": "parser/1336",
  "msg": "no corresponding start tag found for </span>",
  "path": [
    "渤海"
  ],
  "section": "Japanese",
  "subsection": "proper noun",
  "title": "渤海",
  "trace": ""
}

{
  "called_from": "page/1713/20221215",
  "msg": "later head without list of senses,template node #, 渤海/Japanese",
  "path": [
    "渤海"
  ],
  "section": "Japanese",
  "subsection": "proper noun",
  "title": "渤海",
  "trace": ""
}