"琴線" meaning in Japanese

{
  "derived": [
    {
      "_dis1": "0 0",
      "roman": "kokoro no kinsen ni fureru",
      "ruby": [
        [
          "心",
          "こころ"
        ],
        [
          "琴線",
          "きんせん"
        ],
        [
          "触",
          "ふ"
        ]
      ],
      "word": "心の琴線に触れる"
    }
  ],
  "forms": [
    {
      "form": "琴線",
      "ruby": [
        [
          "琴",
          "きん"
        ],
        [
          "線",
          "せん"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kinsen",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "きんせん",
      "roman": "kinsen",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "きんせん",
        "hhira": "きんせん"
      },
      "expansion": "琴(きん)線(せん) • (kinsen) ^(←きんせん (kinsen)?)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "63 37",
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "70 30",
          "kind": "other",
          "name": "Japanese links with redundant alt parameters",
          "parents": [
            "Links with redundant alt parameters",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "70 30",
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "75 25",
          "kind": "other",
          "name": "Japanese terms with 2 kanji",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "70 30",
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "65 35",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "strings of a koto"
      ],
      "id": "en-琴線-ja-noun-xNfFP4hU",
      "links": [
        [
          "string",
          "string"
        ],
        [
          "koto",
          "koto"
        ]
      ]
    },
    {
      "glosses": [
        "part of the heart responsible for emotional responses; heartstrings"
      ],
      "id": "en-琴線-ja-noun-uIphrk06",
      "links": [
        [
          "heartstrings",
          "heartstrings"
        ]
      ],
      "raw_glosses": [
        "(figurative) part of the heart responsible for emotional responses; heartstrings"
      ],
      "tags": [
        "figuratively"
      ]
    }
  ],
  "sounds": [
    {
      "other": "きんせん"
    },
    {
      "ipa": "[kʲĩɰ̃sẽ̞ɴ]"
    }
  ],
  "word": "琴線"
}

{
  "categories": [
    "Japanese entries with incorrect language header",
    "Japanese lemmas",
    "Japanese links with redundant alt parameters",
    "Japanese links with redundant wikilinks",
    "Japanese nouns",
    "Japanese terms spelled with second grade kanji",
    "Japanese terms spelled with secondary school kanji",
    "Japanese terms with 2 kanji",
    "Japanese terms with IPA pronunciation",
    "Japanese terms with redundant sortkeys",
    "Pages with 1 entry"
  ],
  "derived": [
    {
      "roman": "kokoro no kinsen ni fureru",
      "ruby": [
        [
          "心",
          "こころ"
        ],
        [
          "琴線",
          "きんせん"
        ],
        [
          "触",
          "ふ"
        ]
      ],
      "word": "心の琴線に触れる"
    }
  ],
  "forms": [
    {
      "form": "琴線",
      "ruby": [
        [
          "琴",
          "きん"
        ],
        [
          "線",
          "せん"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kinsen",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "きんせん",
      "roman": "kinsen",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "きんせん",
        "hhira": "きんせん"
      },
      "expansion": "琴(きん)線(せん) • (kinsen) ^(←きんせん (kinsen)?)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "strings of a koto"
      ],
      "links": [
        [
          "string",
          "string"
        ],
        [
          "koto",
          "koto"
        ]
      ]
    },
    {
      "glosses": [
        "part of the heart responsible for emotional responses; heartstrings"
      ],
      "links": [
        [
          "heartstrings",
          "heartstrings"
        ]
      ],
      "raw_glosses": [
        "(figurative) part of the heart responsible for emotional responses; heartstrings"
      ],
      "tags": [
        "figuratively"
      ]
    }
  ],
  "sounds": [
    {
      "other": "きんせん"
    },
    {
      "ipa": "[kʲĩɰ̃sẽ̞ɴ]"
    }
  ],
  "word": "琴線"
}

{
  "called_from": "parser/304",
  "msg": "HTML tag <span> not properly closed",
  "path": [
    "琴線"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "琴線",
  "trace": "started on line 2, detected on line 2"
}

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