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Dataset Files

Each file has a stable URL (r-link) that you can use directly in scripts, apps, or AI agents. These URLs are permanent and safe to hardcode.

/calcfi/calcfi-usd-jpy/

├ README.md

https://datahub.io/calcfi/calcfi-usd-jpy/_r/-/README.md

├ data.csv

https://datahub.io/calcfi/calcfi-usd-jpy/_r/-/data.csv

└ datapackage.json

https://datahub.io/calcfi/calcfi-usd-jpy/_r/-/datapackage.json

Key Files

Start with these files — they give you everything you need to understand and access the dataset.

datapackage.json— metadata & schema

https://datahub.io/calcfi/calcfi-usd-jpy/_r/-/datapackage.json

README.md— documentation

https://datahub.io/calcfi/calcfi-usd-jpy/_r/-/README.md

Typical Usage

1. Fetch datapackage.json to inspect schema and resources
2. Download data resources listed in datapackage.json
3. Read README.md for full context

Data Files

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data

Field	Type	Format	Description
date	date	%Y-%m-%d	Observation date (YYYY-MM-DD).
value	number		Exchange rate (units of currency A per 1 unit of currency B).
unit	string		Unit of observation (matches manifest).

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About

Last updated: 19 May 2026
Total rows: ...
Format: CSV
File size: 296 kB
Sources: Federal Reserve Economic Data (FRED); CalcFi live page
License: Creative Commons Attribution 4.0 International

About this dataset

Japanese Yen to US Dollar Exchange Rate

Daily observations of Japanese Yen to US Dollar Exchange Rate (JPY/USD).

At a glance

Field	Value
Slug	`usd-jpy`
Category	forex
Unit	ratio
Cadence	daily
Source	Fed H.10 via FRED (DEXJPUS)
Source series ID	`DEXJPUS`
License	CC BY 4.0

Live data on CalcFi

Latest value + chart: https://calcfi.app/rates/history/usd-jpy
JSON API (no auth): https://calcfi.app/api/rates/usd-jpy
CSV (this file, daily-refreshed via cron): data.csv

Quick start

# Latest single value from the API
curl https://calcfi.app/api/rates/usd-jpy

# Full history from this repo
curl https://raw.githubusercontent.com/jerehere/calcfi-open-data/main/datasets/usd-jpy/data.csv

import pandas as pd
url = "https://raw.githubusercontent.com/jerehere/calcfi-open-data/main/datasets/usd-jpy/data.csv"
df = pd.read_csv(url, parse_dates=["date"])
print(df.tail())

Source + provenance

This dataset mirrors Fed H.10 via FRED (DEXJPUS) (DEXJPUS). Primary source: Federal Reserve Economic Data (FRED).

Values are pulled daily by a GitHub Actions workflow (.github/workflows/refresh.yml) from CalcFi's read-only data API, which itself pulls from primary sources. No transformations or imputations are applied; values are passed through verbatim.

Citation

If you use this dataset, please cite:

CalcFi (2026). Japanese Yen to US Dollar Exchange Rate dataset. https://calcfi.app/rates/history/usd-jpy

License

CC BY 4.0 — attribution requested. The data itself is sourced from Federal Reserve Economic Data (FRED); consult their terms for any additional restrictions.