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Technical Data

Version: 2.0
Revised: 04/01/2026

With the Tokyo Museum Collection (ToMuCo), we are building an integrated database of materials in the collections of the Tokyo metropolitan museums. ToMuCo provides, as open data, the metadata on on all works in the collections. The following explains how to use those data.

For an overview of this site and the terms of use, see the following pages:

How to acquire the data

The following three methods may be used to acquire data with ToMuCo:

  • 1. Click the “metadata download” button on the page giving the details about a work in the collections. You will be able to download the open data on each work from its separate page, in the JSON format. キャプチャー画像：作品詳細ページ
  • 2. With the search API

    It returns the results of a search refined using the search terms you specified. Send a GET request giving the search conditions as parameters. The response will be JSON-format data.

    API Path

                          
https://museumcollection.tokyo/works/?output=json
    Parameters
    Parameter Explanation
    keyword A keyword search term
    artist_name The name of the artist
    genre The genre or category of a work
    medium The materials or techniques
    museums Using the facility code table, specify the museum owning the work. Values will be send in order
    production_year_from Specify the year a work was produced. The search will include all works from that year on.
    production_year_to Specify the year a work was produced. The search will include all works before that year.
    limit Specify the number of items you wish to retrieve. You may specify from 0 to 1000. The initial setting is 100.
    offset Specify the number of items retrieved to be skipped.
    output Specify “json.”

    Sample query (Searching for prints in the Edo-Tokyo Museum collection produced from 1900 on):

    https://museumcollection.tokyo/works/?genre=block-prints&production_year_from=1900&museums[]=edo-tokyo-museum&output=json

    * When the search returns a single result, the top level is a single schema:CreativeWork object. When multiple results are returned, they are returned as an array.

  • 3. IIIF Manifest API

    Returns Manifest data conforming to the IIIF (International Image Interoperability Framework). Multi-page materials can be viewed with an IIIF viewer.

    API Path

                          
https://museumcollection.tokyo/works/{work_id}/?output=iiif

    Returns a JSON-LD Manifest conforming to IIIF Presentation API 2.0.

    Sample URL

    https://museumcollection.tokyo/works/6646969/?output=iiif

Types of Codes

In ToMuCo, the museum code can be set or referenced in the data. It can also be used in search queries.

1. Museum Code
Code Label (Japanese) Label (English) IRI
edo-tokyo-museum 江戸東京博物館   https://museumcollection.tokyo/ns/codes/museums#edo-tokyo-museum
topmuseum 東京都写真美術館   https://museumcollection.tokyo/ns/codes/museums#topmuseum
mot-art-museum 東京都現代美術館   https://museumcollection.tokyo/ns/codes/museums#mot-art-museum
tatemonoen 江戸東京たてもの園   https://museumcollection.tokyo/ns/codes/museums#tatemonoen
tobikan 東京都美術館   https://museumcollection.tokyo/ns/codes/museums#tobikan
teien-art-museum 庭園美術館   https://museumcollection.tokyo/ns/codes/museums#teien-art-museum

Data Format

ToMuCo returns the data, in JSON format, in the standard categories defined by ToMuCo.

ToMuCo Standard Categories

The ToMuCo standard categories refer to data categories that are standardized to permit sharing data among the museums. Table 1 gives the original data categories used by each museum and the ToMuCo standard categories.

・We are not able to guarantee that all the values as specified here will be in uniform in data acquired from ToMuCo. If the value in question is missing, a null character string will appear.

Table 1: ToMuCo standard categories and the corresponding original data categories used by each museum

ToMuCo共通項目 江戸東京博物館 東京都写真美術館 東京都現代美術館 江戸東京たてもの園 東京都美術館 庭園美術館
ID 資料番号 作品番号/Art number 収蔵作品番号 資料番号 作品番号 収蔵品No.
作品名 資料名 作品名（和）/Title in Japanese 作品名 建造物名 作品名 作品名
作品名（en） 資料名（英） 作品名（英）/Title in English 作品名英文 Name 作品名（英題） Title
大分類名 一分類 区分/Category 作品分類   中分類 大分類
中分類名 二分類          
制作年 西暦年月日 制作年/Date 制作年 制作年（建築年） 制作年（西暦） 制作年
所蔵館       所蔵館    
サイズ（高さ） 寸法_高さ   サイズ（高さ、縦）   寸法（高さ、縦）cm  
サイズ（幅） 寸法_横   サイズ（横、幅）   寸法（幅、横）cm  
サイズ（奥行） 寸法_縦   サイズ（奥行）   寸法（奥行き）cm  
寸法（公開用）   寸法/Size（和）       寸法
収集方法 収集方法 受入方法       収集の方法
作者名 作者名   作家名   作家名 作者名
作者名（en） 作者名（英）   作家名英文   作家名（英語表記） Artist name
材質・技法   技法/Technique（和） 材質・技法   材質・技法 素材・技法
材質・技法（en）     材質・技法（英文）   材質・技法（英文）  
生没年     生没年     生没年
解説 解説 解説（和）   解説    

Response Data

The ToMuCo standard categories are returned in JSON-LD format. For the data model, see the schma.org CreativeWork. A number of classes become nested structures. The properties and values of each class are listed below.

* JSON-LD is the JSON term for “Linked Data.” For details, see the W3C document.
* On Schema.org, data models have been established for a variety of concepts.

Diagram: Response Data Structure
Diagram: Response Data Structure
schema:CreativeWork
Property Value ToMuCo Standard Category
schema:identifier schema:PropertyValue Array  
schema:genre skos:Concept Array （Refer to the Category code) Broad category, subcategory
schema:name literal array （Language specified with language tag) Name of work (Ja), name of work (En)
schema:creator schema:Person  
schema:size literal array （Language specified with language tag) Size (height), size (width), size (depth), dimensions
schema:dateCreated 4 digit number Date produced
schema:material literal array （Language specified with language tag) Material, technique (Ja), Material, technique (En)
schema:isPartOf schema:Collection Array  
schema:license literal License URI
schema:image schema:ImageObject Array Reference to downloadable images
schema:associatedMedia schema:MediaObject Array Reference to associated media such as IIIF Manifest
dct:provenance literal array （Language specified with language tag) How acquired
schema:description literal array （Language specified with language tag) Description

schema:PropertyValue

The ToMuCo ID and the accession number are two ID systems. The ToMuCo ID is an identifier for works within ToMuCo. The A accession number is an identifier applied by each museum and based on the root data.

Property Value ToMuCo Standard Category
schema:value literal （identifier within the ID system) ID（accession number）
schema:name literal （label indicating the ID system）  
schema:Person
Property Value ToMuCo Standard Category
schema:name literal array （Language specified with language tag) Name of artist (Ja), name of artist (En)
schema:birthDate xsd:date Birth and death (year of birth)
schema:deathDate xsd:date Birth and death (year of death)

schema:Collection

Each work must be included in the collection of the museum that owns it. When works form a series, they are presented as sceme:Collection objects.

Property Value ToMuCo Standard Category
schema:maintainer schema:Organization Array  
schema:name literal array （Language specified with language tag) Museum
schema:Organization
Property Value ToMuCo Standard Category
schema:name literal array （Language specified with language tag) Museum

schema:ImageObject

Metadata for downloadable images. Referenced from the schema:image property.

Property Value Description
@type literal "schema:ImageObject"
@id URI Image URI
schema:name literal Image size type (e.g. "M", "S")
schema:contentUrl URI Image download URL
schema:encodingFormat literal MIME type (e.g. "image/jpeg")
schema:license URI License URI for the image
schema:creditText literal Credit text

schema:MediaObject

Metadata for associated media such as IIIF Manifests. Referenced from the schema:associatedMedia property.

Property Value Description
@type literal "schema:MediaObject"
@id URI Media URI
schema:name literal Media type name (e.g. "IIIF Manifest")
schema:contentUrl URI Media URL
schema:encodingFormat literal MIME type (e.g. "application/ld+json")

IIIF Manifest Response

The IIIF Manifest API returns JSON-LD conforming to IIIF Presentation API 2.0. The main structure is as follows:

  • sequences[].canvases[] — Information for each page (Canvas). The height and width indicate the pixel dimensions of the image.
  • images[].resource — The image resource placed on the Canvas.
  • images[].resource.service — The IIIF Image API endpoint. Using the @id value as the base URL, you can retrieve partial images, resize, and more via the IIIF Image API.

Data Example 1 (With downloadable images — Work ID: 6379100)

                  
{
    "@context": {
        "dct": "http://purl.org/dc/elements/1.1/",
        "schema": "http://schema.org/",
        "xsd": "http://www.w3.org/2001/XMLSchema#",
        "rdf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#",
        "rdfs": "http://www.w3.org/2000/01/rdf-schema#"
    },
    "@type": "schema:CreativeWork",
    "@id": "https://museumcollection.tokyo/works/6379100/",
    "schema:identifier": [
        {
            "@type": "PropertyValue",
            "schema:name": "TMC ID",
            "schema:value": "6379100"
        },
        {
            "@type": "PropertyValue",
            "schema:name": "accession number",
            "schema:value": "1975-00-0153-000"
        }
    ],
    "schema:genre": [
        {
            "@id": "https://museumcollection.tokyo/ns/codes/genre#絵画",
            "skos:preflabel": {
                "@value": "絵画",
                "@lang": "ja"
            }
        }
    ],
    "schema:name": [
        {
            "@value": "静物",
            "@lang": "ja"
        },
        {
            "@value": "Still Life",
            "@lang": "en"
        }
    ],
    "schema:creator": {
        "@type": "schema:Person",
        "schema:name": [
            {
                "@value": "川口　軌外",
                "@lang": "ja"
            },
            {
                "@value": "KAWAGUCHI Kigai",
                "@lang": "en"
            }
        ]
    },
    "schema:dateCreated": "1957",
    "schema:license": "http://creativecommons.org/publicdomain/mark/1.0/",
    "schema:image": [
        {
            "@type": "schema:ImageObject",
            "@id": "https://museumcollection.tokyo/wp-content/uploads/download/1975-00-0153-000_m.jpg",
            "schema:name": "M",
            "schema:contentUrl": "https://museumcollection.tokyo/wp-content/uploads/download/1975-00-0153-000_m.jpg",
            "schema:encodingFormat": "image/jpeg",
            "schema:license": "http://creativecommons.org/publicdomain/mark/1.0/",
            "schema:creditText": "川口　軌外「静物」（東京都現代美術館）出典： Tokyo Museum Collection （https://museumcollection.tokyo/works/6379100/）"
        },
        {
            "@type": "schema:ImageObject",
            "@id": "https://museumcollection.tokyo/wp-content/uploads/download/1975-00-0153-000_s.jpg",
            "schema:name": "S",
            "schema:contentUrl": "https://museumcollection.tokyo/wp-content/uploads/download/1975-00-0153-000_s.jpg",
            "schema:encodingFormat": "image/jpeg",
            "schema:license": "http://creativecommons.org/publicdomain/mark/1.0/",
            "schema:creditText": "川口　軌外「静物」（東京都現代美術館）出典： Tokyo Museum Collection （https://museumcollection.tokyo/works/6379100/）"
        }
    ],
    "schema:material": [
        {
            "@value": "油彩/キャンバス",
            "@lang": "ja"
        },
        {
            "@value": "Oil on canvas",
            "@lang": "en"
        }
    ],
    "schema:isPartOf": [
        {
            "@type": "schema:Collection",
            "schema:maintainer": [
                {
                    "@type": "schema:Organization",
                    "schema:name": [
                        {
                            "@value": "東京都現代美術館",
                            "@lang": "ja"
                        },
                        {
                            "@value": "Museum of Contemporary Art Tokyo",
                            "@lang": "en"
                        }
                    ]
                }
            ]
        }
    ]
}

Data Example 2 (With IIIF Manifest reference — Work ID: 6646969)

                  
{
    "@context": {
        "dct": "http://purl.org/dc/elements/1.1/",
        "schema": "http://schema.org/",
        "xsd": "http://www.w3.org/2001/XMLSchema#",
        "rdf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#",
        "rdfs": "http://www.w3.org/2000/01/rdf-schema#"
    },
    "@type": "schema:CreativeWork",
    "@id": "https://museumcollection.tokyo/works/6646969/",
    "schema:identifier": [
        {
            "@type": "PropertyValue",
            "schema:name": "TMC ID",
            "schema:value": "6646969"
        },
        {
            "@type": "PropertyValue",
            "schema:name": "accession number",
            "schema:value": "88200129-88200130"
        }
    ],
    "schema:genre": [
        {
            "@id": "https://museumcollection.tokyo/ns/codes/genre#版本",
            "skos:preflabel": {
                "@value": "版本",
                "@lang": "ja"
            }
        }
    ],
    "schema:name": [
        {
            "@value": "青楼絵本年中行事",
            "@lang": "ja"
        },
        {
            "@value": "Seirou Ehon Nenchu Gyoji (Picture Book: Annual Events in Yoshiwara)",
            "@lang": "en"
        }
    ],
    "schema:creator": {
        "@type": "schema:Person",
        "schema:name": [
            {
                "@value": "十返舎一九／著　喜多川歌麿／／画",
                "@lang": "ja"
            }
        ]
    },
    "schema:size": "22.5 cm x 15.6 cm",
    "schema:dateCreated": "1804",
    "schema:associatedMedia": [
        {
            "@type": "schema:MediaObject",
            "@id": "https://museumcollection.tokyo/works/6646969/?output=iiif",
            "schema:name": "IIIF Manifest",
            "schema:contentUrl": "https://museumcollection.tokyo/works/6646969/?output=iiif",
            "schema:encodingFormat": "application/ld+json"
        }
    ],
    "schema:isPartOf": [
        {
            "@type": "schema:Collection",
            "schema:maintainer": [
                {
                    "@type": "schema:Organization",
                    "schema:name": [
                        {
                            "@value": "江戸東京博物館",
                            "@lang": "ja"
                        },
                        {
                            "@value": "Edo-Tokyo Museum",
                            "@lang": "en"
                        }
                    ]
                }
            ]
        }
    ]
}