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Japan's official data, rebuilt for institutional use.

Comprehensive official statistics and company filings for Japan, rebuilt from the primary sources and archived as point-in-time vintages. Every figure carries its source and a permanent URL.

Explore the data Connect by API or MCP

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Datasets

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Listed companies

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Filings parsed

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Primary sources

Your Investment Assistant Ask in plain language. The answer is drawn from the same API, and charted or tabulated beside it.

Or Call It Directly REST, JSON, no key

Request

GET /api/v1/cpi-jp/observations
    ?series=0001&measure=yoy
    &start=2016-01
    &as_of=…        # the release in force on that date

One endpoint per dataset. Add as_of and you get the vintage a reader would have seen that day, not today's revision. API reference

Response

{ … }

Live response, abbreviated to its first points.

Why It Can Be Trusted

Primary sources only

Every source file archived with its checksum.

Point-in-time vintages

A revision is a new vintage. Any date is replayable.

Official vs calculated

Published values exact. Computed values show their formula.

Every view has an address

The URL carries the whole chart or table.

From Asia Economics Observations The research letter written on this data

Featured

Open the chart

Built For

Sell-side economists

The Japan chart pack, citable.

Contributions to headline CPI by group, breadth across 582 items, the curve on any date, the BOJ balance sheet by asset. Every chart exports with its source embedded.

Quant and data teams

One endpoint per dataset, vintage-selectable.

Replay any dataset as it stood on a given date for a point-in-time backtest. JSON with the formula and calc version in the payload.

Academics

Free, stable URLs, stated methodology.

Cite the page. The number, the formula and the source file behind it stay reachable at that address.