Real-world data sources — energy, hydrology, geospatial, real estate and more — centered on Japan and including U.S. corporate disclosures and global datasets. For each one: who publishes it, the license it can be used under, the area and period it covers, and how often it is updated. Both the publisher and the license link to the original. Published data is refreshed at most every 30 minutes — sources that change more often are aggregated to 30-minute granularity.
46 data sources across 16 domains.
Energy5
OCCTO Per-Unit Generation Records (OCCTO ユニット別発電実績)
Per-unit generation records published by the Per-Unit Generation Disclosure System. Covers unit × 30 minutes × 48 intervals per day, across all 10 nationwide areas — the only official source publishing output at the individual generating-unit level.
OCCTO Copyright and Terms of Use Credit: Source: Organization for Cross-regional Coordination of Transmission Operators (OCCTO) Original (use this wording): 出典：電力広域的運営推進機関（OCCTO）
Supply-demand balance and reserve margin by wide-area block, and operating capacity / margin / available capacity by interconnector. Published at 30-minute × 48-interval-per-day granularity, across three forecast horizons: current/next day, day-after-next, and the coming week.
OCCTO Copyright and Terms of Use Credit: Source: Organization for Cross-regional Coordination of Transmission Operators (OCCTO) Original (use this wording): 出典：電力広域的運営推進機関（OCCTO）
Power-flow records for domestic trunk transmission lines, published by the Grid Information Service. Covers 30-minute × 48 intervals per day, per transmission line, across all 10 areas (including Okinawa).
OCCTO Copyright and Terms of Use Credit: Source: Organization for Cross-regional Coordination of Transmission Operators (OCCTO) Original (use this wording): 出典：電力広域的運営推進機関（OCCTO）
Public Data License v1.0 (PDL 1.0) Credit: Source: "LNG Inventory for Power Generation" (Agency for Natural Resources and Energy, METI) (https://www.enecho.meti.go.jp/category/electricity_and_gas/electricity_measures/); compiled by Makuhari Development Corporation Original (use this wording): 出典：「発電用ＬＮＧの在庫状況」（経済産業省 資源エネルギー庁）（https://www.enecho.meti.go.jp/category/electricity_and_gas/electricity_measures/）をもとに株式会社幕張開発作成
Coverage
Nationwide Japan (nationwide total only)
Next update
Not published by the source
Area-level Supply and Demand Records
Energy
Area-level electricity supply-and-demand records (demand and generation-mix breakdown) published by each general power transmission and distribution utility.
Period
2016–present
Publisher
10 general transmission and distribution utilities
License
Individual terms of use per utility
Coverage
10 areas covering all of Japan
Published on each transmission operator's own site. Redistribution or API provision needs each operator's individual permission.
Published on MLIT's National Land Numerical Information (KSJ) download site. Terms vary by data item, edition and area: attribution and a statement of any processing are required, and some items are non-commercial only or carry additional municipal conditions.
KSJ Natural parks
Geospatial
Natural-park boundaries and their special and protected zones.
Published on MLIT's National Land Numerical Information (KSJ) download site. Terms vary by data item, edition and area: attribution and a statement of any processing are required, and some items are non-commercial only or carry additional municipal conditions.
KSJ School districts
Geospatial
Elementary and junior-high school catchment boundaries and associated school information.
Published on MLIT's National Land Numerical Information (KSJ) download site. Terms vary by data item, edition and area: attribution and a statement of any processing are required, and some items are non-commercial only or carry additional municipal conditions.
Published on MLIT's National Land Numerical Information (KSJ) download site. Terms vary by data item, edition and area: attribution and a statement of any processing are required, and some items are non-commercial only or carry additional municipal conditions.
Population5
e-Stat Population Census
Population
Population, households, age structure, employment and housing statistics by municipality, small area and regional mesh.
Published on e-Stat, the Portal Site of Official Statistics of Japan. Commercial use is allowed with attribution under the Government of Japan Standard Terms of Use (Version 2.0); state any processing or editing.
e-Stat Foreign Residents by Municipality
Population
Foreign-resident counts by municipality and nationality or region, retaining geographic classifications for each statistical period.
Published on e-Stat, the Portal Site of Official Statistics of Japan. Commercial use is allowed with attribution under the Government of Japan Standard Terms of Use (Version 2.0); state any processing or editing.
e-Stat Internal Migration Statistics
Population
Monthly migration counts and annual statistics including municipality-to-municipality flows. Geographic coverage differs between monthly and annual results.
Published on e-Stat, the Portal Site of Official Statistics of Japan. Commercial use is allowed with attribution under the Government of Japan Standard Terms of Use (Version 2.0); state any processing or editing.
e-Stat Vital Statistics by Local Area
Population
Annual final statistics on births, deaths, marriages and divorces by municipality.
Published on e-Stat, the Portal Site of Official Statistics of Japan. Commercial use is allowed with attribution under the Government of Japan Standard Terms of Use (Version 2.0); state any processing or editing.
KSJ Population projections
Population
Projected population by 250 m grid and forecast year, with suppression and aggregation categories.
Published on MLIT's National Land Numerical Information (KSJ) download site. Terms vary by data item, edition and area: attribution and a statement of any processing are required, and some items are non-commercial only or carry additional municipal conditions.
Economy3
e-Stat Family Income, Expenditure, Savings and Liabilities
Economy
Household income, expenditure, savings and liabilities by published city, retaining household groups, sample estimates and statistical periods.
Published on e-Stat, the Portal Site of Official Statistics of Japan. Commercial use is allowed with attribution under the Government of Japan Standard Terms of Use (Version 2.0); state any processing or editing.
e-Stat Economic Census for Business Activity
Economy
Establishment counts, employment and industry composition by municipality, small area and regional mesh.
Published on e-Stat, the Portal Site of Official Statistics of Japan. Commercial use is allowed with attribution under the Government of Japan Standard Terms of Use (Version 2.0); state any processing or editing.
e-Stat Economic Census for Business Frame
Economy
Business-frame statistics for private establishments and establishments of national and local government, preserving their distinct populations and survey years.
Published on e-Stat, the Portal Site of Official Statistics of Japan. Commercial use is allowed with attribution under the Government of Japan Standard Terms of Use (Version 2.0); state any processing or editing.
Hydrology & rivers1
River Disaster Prevention Information
Hydrology & rivers・Disaster prevention
Observational data — reservoir water level, inflow, discharge, and more — published for dams and rivers nationwide.
River Disaster Prevention Information — Notes on Handling Credit: Source: MLIT River Disaster Prevention Information website (https://www.river.go.jp/) Original (use this wording): 出典：国土交通省 川の防災情報ホームページ（https://www.river.go.jp/）
Coverage
Nationwide Japan
Published on MLIT's River Disaster Prevention Information site (commercial use allowed with attribution). Periodic automated collection is discouraged; the sanctioned route for continuous retrieval is the paid, contract-based River Information Numerical Data Distribution Service.
The list of all documents filed with Japan's EDINET (metadata for every filing: submission time, filer, document type, amendment / withdrawal / non-disclosure status) and the source documents (XBRL / CSV / PDF) of large shareholding reports, extraordinary reports, share buyback status reports, tender-offer filings, annual and semi-annual securities reports and parent company status reports.
Update frequency
Daily (collected by MKHR; observations at ~5-minute intervals)
EDINET Terms of Use (based on the Public Data License 1.0) Credit: Source: EDINET (Financial Services Agency of Japan) (https://disclosure2.edinet-fsa.go.jp/), compiled by Makuhari Kaihatsu Co., Ltd. (Public Data License 1.0) Original (use this wording): 出典：EDINET閲覧（提出）サイト（金融庁）（https://disclosure2.edinet-fsa.go.jp/）をもとに株式会社幕張開発作成（公共データ利用規約 PDL1.0）
Coverage
Entities required to file on EDINET: mainly Japanese listed companies and their shareholders, including foreign companies and overseas institutional investors
Last updated
Not published by the source
U.S. Earnings Releases (SEC EDGAR 8-K / 6-K)
Finance
Earnings releases filed with SEC EDGAR by U.S.-listed companies (8-K / 6-K), with the EPS, revenue and source-document links read from each.
Published on e-Stat, the Portal Site of Official Statistics of Japan. Commercial use is allowed with attribution under the Government of Japan Standard Terms of Use (Version 2.0); state any processing or editing.
e-Stat Housing and Land Survey
Real estate
Statistics on housing stock, vacant dwellings, building structure and land ownership.
Published on e-Stat, the Portal Site of Official Statistics of Japan. Commercial use is allowed with attribution under the Government of Japan Standard Terms of Use (Version 2.0); state any processing or editing.
Real estate: listed property data
Real estate
Location, price, floor area, building age and listing status of rental and for-sale properties listed on a Japanese property portal.
Locations and attributes of schools, medical, welfare and cultural facilities, government offices, fire services, waste facilities and sewerage facilities.
Published on MLIT's National Land Numerical Information (KSJ) download site. Terms vary by data item, edition and area: attribution and a statement of any processing are required, and some items are non-commercial only or carry additional municipal conditions.
Japan shop and facility POI
Facilities & POI・Geospatial
Locations and categories of shops and facilities across Japan.
Machine-observed directional traffic volume from continuous-observation equipment installed on nationally administered roads. Four formats are published, combining observation method (fixed traffic counters / AI analysis of CCTV footage) with aggregation interval (5-minute / 1-hour). Roughly 1,885 observation points per interval, broken down by vehicle size and direction. These are reference values, not the results of MLIT's official traffic census.
Update frequency
Daily (collected by MKHR; 5-minute and hourly values)
xROAD Traffic Volume API Terms of Use Credit: This service uses the Traffic Volume API, but the content of the service is not guaranteed by MLIT. / Traffic volume (reference values) via the MLIT API, processed for use. Original (use this wording): このサービスは、交通量 API 機能を使用していますが、サービスの内容は国土交通省によって保証されたものではありません。／国土交通省 API 機能による交通量(参考値)を加工して作成
Coverage
Nationally administered roads across Japan (10 Regional Development Bureau divisions: Hokkaido, Tohoku, Kanto, Hokuriku, Chubu, Kinki, Chugoku, Shikoku, Kyushu, Okinawa)
Next update
Not published by the source
Traffic Accident Statistics Open Data (交通事故統計情報のオープンデータ)
Public Data License v1.0 (PDL 1.0) Credit: Source: "Traffic Accident Statistics Open Data" (National Police Agency) (https://www.npa.go.jp/publications/statistics/koutsuu/opendata/index_opendata.html), compiled by Makuhari Development Corporation Original (use this wording): 出典：「交通事故統計情報のオープンデータ」（警察庁）（https://www.npa.go.jp/publications/statistics/koutsuu/opendata/index_opendata.html）をもとに株式会社幕張開発作成
Coverage
Japan, nationwide
Last updated
2025-09-19
Vessel Traffic Service Center Arrival/Departure Schedules (MARTIS)
Vessel arrival/departure schedules published by the Tokyo Bay and other Vessel Traffic Service centers. Pages are updated continuously and past versions are not retained.
Update frequency
Daily (collected by MKHR; observations at ~5-minute intervals)
Public Data License v1.0 (PDL 1.0) Credit: Source: Japan Coast Guard website (https://www6.kaiho.mlit.go.jp/tokyowan/ and other center pages); processed by Makuhari Development Corporation Original (use this wording): 出典：海上保安庁ホームページ（https://www6.kaiho.mlit.go.jp/tokyowan/ ほか各センターのページ）を株式会社幕張開発が加工して作成
Coverage
Tokyo Bay and other Vessel Traffic Service center jurisdictions
Next update
Not published by the source
KSJ Transport
Transport
Geospatial data for railway lines and stations, bus stops, expressways and interchanges.
Published on MLIT's National Land Numerical Information (KSJ) download site. Terms vary by data item, edition and area: attribution and a statement of any processing are required, and some items are non-commercial only or carry additional municipal conditions.
A portal for cross-searching tender notices posted on the websites of contracting authorities — national government, independent administrative agencies, local governments and others. Publishes a search API returning XML.
KKJ Portal Terms of Use Credit: Uses the API of the KKJ Portal (https://www.kkj.go.jp/s/) Original (use this wording): 官公需情報ポータルサイト（https://www.kkj.go.jp/s/）の API を利用しています
Coverage
Nationwide Japan (national government, independent administrative agencies, local governments and other contracting authorities)
A portal site for searching national government procurement information. Integrated with the Government Electronic Procurement System (GEPS), providing a public search page for procurement-case notices.
Government of Japan Standard Terms of Use (Version 2.0) Credit: Source: created by processing data from the Procurement Portal (https://www.p-portal.go.jp/) Original (use this wording): 出典：調達ポータル（https://www.p-portal.go.jp/）を加工して作成
Coverage
Japan, nationwide (national government procurement)
Last updated
Not published by the source
Procurement Portal Award Records Open Data (調達ポータル 落札実績オープンデータ)
Open data on contract-award records (case number, case name, contract date, award amount, item classification, contracting authority, winning bidder, Corporate Number) for national government bodies, distributed as CSV by fiscal year. Roughly 310,000 records cumulative since FY2013.
Government of Japan Standard Terms of Use (Version 2.0) Credit: Source: created by processing data from the Procurement Portal (https://www.p-portal.go.jp/) Original (use this wording): 出典：調達ポータル（https://www.p-portal.go.jp/）を加工して作成
Coverage
Japan, nationwide (national government bodies and some independent administrative agencies; local governments not included)
Last updated
2026-08-24
Government3
e-Stat Local Government Pay Comparisons
Government
Comparative statistics on local-government pay, employee age and Laspeyres indices.
Published on e-Stat, the Portal Site of Official Statistics of Japan. Commercial use is allowed with attribution under the Government of Japan Standard Terms of Use (Version 2.0); state any processing or editing.
e-Stat Local Government Finance Statistics
Government
Local-government accounts, revenue and expenditure, retaining reporting bodies and fiscal years.
Published on e-Stat, the Portal Site of Official Statistics of Japan. Commercial use is allowed with attribution under the Government of Japan Standard Terms of Use (Version 2.0); state any processing or editing.
KSJ Administrative boundaries
Government
Administrative boundaries, names and codes for prefectures and municipalities.
Published on MLIT's National Land Numerical Information (KSJ) download site. Terms vary by data item, edition and area: attribution and a statement of any processing are required, and some items are non-commercial only or carry additional municipal conditions.
Goods & e-commerce2
Digital content: sales data
Goods & e-commerce
Price, sales count, ratings, tags and release date of works listed on a Japanese storefront.
Public metadata of every model repository on the Hugging Face Hub (about 3.07 million): downloads, likes, creation time, task type, license and base_model (derivation) tags. The source exposes current values only, with no history, and the model weights themselves are not included.
Update frequency
Daily (collected by MKHR; daily values for all models)
Hugging Face Terms of Service Credit: Source: compiled by Makuhari Development Corporation from the public API of the Hugging Face Hub (https://huggingface.co/) Original (use this wording): 出典：Hugging Face Hub（https://huggingface.co/）の公開 API をもとに株式会社幕張開発作成
Coverage
Site-wide (no geographic dimension)
Last updated
Not published by the source
Corporations3
Corporate Number Publication Site (Basic 3 Items) (法人番号公表サイト（基本3情報）)
The Corporate Number, trade name, and head-office address (the "basic 3 items") for every corporation assigned a Corporate Number by the National Tax Agency, plus their change/closure history. Covers a full monthly snapshot and daily deltas. Coverage period: full snapshots from 2015-10-05 (when Corporate Number assignment began) to present; daily changes from 2026-07-09 to present.
Public Data License v1.0 (PDL 1.0) Credit: Source: Corporate Number Publication Site (National Tax Agency) (https://www.houjin-bangou.nta.go.jp/), compiled by Makuhari Development Corporation Original (use this wording): 出典：国税庁法人番号公表サイト（国税庁）（https://www.houjin-bangou.nta.go.jp/）をもとに株式会社幕張開発作成
Coverage
Japan, nationwide (including corporations located overseas)
Corporate activity information held by various ministries and agencies, linked by Corporate Number. Covers basic information (capital, employee count, representative, unified government qualifications, etc.) as well as tables for establishments, notifications/certifications, awards, subsidies, procurement, patents, finances, workplace information, and financial-statement disclosures. Coverage period: 2026-09-05 to present.
Update frequency
Daily (collected by MKHR; monthly full snapshot per table)
Government of Japan Standard Terms of Use (Version 2.0) Credit: Source: "gBizINFO" (METI) (https://info.gbiz.go.jp/); compiled by Makuhari Development Corporation Original (use this wording): 出典：「Gビズインフォ」（経済産業省）（https://info.gbiz.go.jp/）をもとに株式会社幕張開発作成
Coverage
Nationwide Japan
Next update
Not published by the source
Qualified Invoice Issuer Publication Site (Registered Businesses) (適格請求書発行事業者公表サイト（登録事業者）)
Registration number, name, address, registration date, revocation date, and expiration date for qualified invoice issuers under the invoice system, broken out by corporation / unincorporated association / individual. Covers a full monthly snapshot and per-business-day deltas. Coverage period: full snapshots from 2021-10-01 (when registration began) to present; daily changes from 2026-07-08 to present.
Public Data License v1.0 (PDL 1.0) Credit: Source: Qualified Invoice Issuer Publication Site (National Tax Agency) (https://www.invoice-kohyo.nta.go.jp/), compiled by Makuhari Development Corporation Original (use this wording): 出典：国税庁適格請求書発行事業者公表サイト（国税庁）（https://www.invoice-kohyo.nta.go.jp/）をもとに株式会社幕張開発作成
Coverage
Japan, nationwide (including businesses located overseas)
Next update
Not published by the source
Each dataset is provided without warranty, under the terms set by its original publisher. Check the license text linked on each source before use. When published data is derived from these sources, most licenses require — in addition to crediting the source — a clear statement that the data was modified (and under some licenses, by whom). The “Credit” line on each source is wording that can be used as-is for that purpose. Where a credit line is shown in English, it is our translation for readability — the Japanese original underneath is the wording the license actually requires, so reproduce that one.
On each tile, the mark at top right says what MKHR does (Serving / Listed only / Collected only); the word next to the icon is the finest interval at which MKHR observes the source — the coarser of the source’s own update interval and our collection interval, not the delivery unit (a source that updates continuously but is polled every 5 minutes reads “5 min”; 5-minute values collected once a day read “daily”).
