# 関連論文を探す (/ja/api-reference/endpoint/research-related-papers)

<!-- agent-signals: reading_time_min: 2 · est_tokens: 1650 · updated: 2026-07-30 -->
Related: [検索](/ja/api-reference/endpoint/search.md), [検索フィードバック](/ja/api-reference/endpoint/search-feedback.md), [スクレイプ](/ja/api-reference/endpoint/scrape.md), [バッチスクレープ](/ja/api-reference/endpoint/batch-scrape.md), [バッチスクレイプのステータス取得](/ja/api-reference/endpoint/batch-scrape-get.md), [バッチスクレイプのキャンセル](/ja/api-reference/endpoint/batch-scrape-delete.md)

起点となる論文から構造的に範囲を広げ、自然言語の`intent`に照らして候補論文を順位付けします。`mode`を使って、類似論文、被引用論文、または参考文献を選択します。

workflow の概要については、[Research Index ガイド](/ja/features/research)を参照してください。

`GET /search/research/papers/{id}/similar`

関連論文を検索

## OpenAPI

```json
{
  "security": [
    {
      "bearerAuth": []
    }
  ],
  "parameters": [
    {
      "description": "基準となるシード論文の参照。",
      "examples": {
        "paperId": {
          "summary": "正規 paperId",
          "value": "2014215642691656232"
        },
        "sourceId": {
          "summary": "ソース固有の primaryId",
          "value": "arxiv:2105.05233"
        }
      },
      "in": "path",
      "name": "id",
      "required": true,
      "schema": {
        "type": "string"
      }
    },
    {
      "description": "セマンティックランキングに使用する、自然言語でのランキング/絞り込み条件。",
      "in": "query",
      "name": "intent",
      "required": true,
      "schema": {
        "minLength": 1,
        "type": "string"
      }
    },
    {
      "description": "構造的な拡張モード。",
      "in": "query",
      "name": "mode",
      "required": false,
      "schema": {
        "default": "similar",
        "enum": [
          "similar",
          "citers",
          "references"
        ],
        "type": "string"
      }
    },
    {
      "description": "返す関連論文の最大件数。",
      "in": "query",
      "name": "k",
      "required": false,
      "schema": {
        "default": 40,
        "maximum": 500,
        "minimum": 1,
        "type": "integer"
      }
    },
    {
      "description": "統合された候補に対して、さらに再ランキングを適用します。",
      "in": "query",
      "name": "rerank",
      "required": false,
      "schema": {
        "type": "boolean"
      }
    },
    {
      "description": "追加のシード論文参照。複数のアンカーを指定する場合は、このパラメータを繰り返してください。",
      "in": "query",
      "name": "anchor",
      "required": false,
      "schema": {
        "type": "string"
      }
    }
  ],
  "responses": {
    "200": {
      "content": {
        "application/json": {
          "example": {
            "poolSize": 40,
            "results": [
              {
                "abstract": "We present high quality image synthesis results using diffusion probabilistic models...",
                "ids": {
                  "arxiv": [
                    "2006.11239"
                  ]
                },
                "paperId": "482107036680302043",
                "primaryId": "arxiv:2006.11239",
                "score": 0.032119,
                "signals": {
                  "articleRank": 0.00031,
                  "seedOverlap": 2,
                  "semantic": 0.61,
                  "structural": 12
                },
                "title": "Denoising Diffusion Probabilistic Models"
              }
            ],
            "success": true,
            "truncated": false
          },
          "schema": {
            "properties": {
              "note": {
                "nullable": true,
                "type": "string"
              },
              "poolSize": {
                "minimum": 0,
                "type": "integer"
              },
              "results": {
                "items": {
                  "properties": {
                    "abstract": {
                      "type": "string"
                    },
                    "ids": {
                      "additionalProperties": {
                        "items": {
                          "type": "string"
                        },
                        "type": "array"
                      },
                      "description": "名前空間ごとにグループ化されたソース識別子。",
                      "example": {
                        "arxiv": [
                          "2105.05233"
                        ]
                      },
                      "type": "object"
                    },
                    "paperId": {
                      "description": "正規の論文 ID。SERP で検出された表示結果の場合は web:<url>。",
                      "type": "string"
                    },
                    "primaryId": {
                      "description": "arxiv:<id>、pmid:<id>、pmcid:<id>、doi:<id> などの推奨 cite/fetch ID。",
                      "type": "string"
                    },
                    "score": {
                      "format": "double",
                      "type": "number"
                    },
                    "signals": {
                      "properties": {
                        "articleRank": {
                          "description": "構造拡張による article-rank スコア。",
                          "format": "double",
                          "type": "number"
                        },
                        "seedOverlap": {
                          "description": "この候補に接続されている異なるシード数。",
                          "minimum": 0,
                          "type": "integer"
                        },
                        "semantic": {
                          "description": "意図検索によるセマンティックスコア。",
                          "format": "double",
                          "type": "number"
                        },
                        "structural": {
                          "description": "生の構造グラフシグナル。",
                          "format": "double",
                          "type": "number"
                        }
                      },
                      "required": [
                        "structural",
                        "semantic",
                        "articleRank",
                        "seedOverlap"
                      ],
                      "type": "object"
                    },
                    "title": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "paperId",
                    "primaryId",
                    "title",
                    "abstract",
                    "score"
                  ],
                  "type": "object"
                },
                "type": "array"
              },
              "success": {
                "type": "boolean"
              },
              "truncated": {
                "type": "boolean"
              }
            },
            "required": [
              "success",
              "results",
              "poolSize",
              "truncated"
            ],
            "type": "object"
          }
        }
      },
      "description": "順位付けされた関連論文。"
    },
    "400": {
      "description": "無効なリクエスト"
    },
    "401": {
      "description": "bearer token が存在しないか無効です"
    },
    "429": {
      "description": "レート制限を超過しました"
    },
    "500": {
      "description": "内部サーバーエラー"
    }
  }
}
```