At a glance
J-Quants facts come from its home page, plan and data pages, rate limit page and help pages, read on 12 November 2026. The pages read give no price for J-Quants Pro. Narwhal API is owned and operated by Nusantara Ventures, LLC.
| Requirement | Narwhal API | J-Quants API |
|---|---|---|
| Coverage | Japan: over 3,800 companies with annual and semiannual reports from EDINET. No share prices | Japanese listed issues: prices, indices, margin trading and short selling data, plus financial data |
| Financial statements | Standardised statements by company id, with amounts in yen as filed | Summary financial data on every plan, within that plan's history window. Balance sheet, income statement and cash flow data on Premium only |
| History | Full history on every account | 2 years on Free, 5 on Light, 10 on Standard and up to 20 on Premium |
| Free tier | $10 free every month at 50 a minute, commercial apps allowed | Free plan with 2 years of data, delayed 12 weeks, at 5 requests a minute. It ends after one year |
| Paid plans | Prepaid credit, top-ups from $20. Company and filings data cost $10 per 1,000 calls | Light 1,650 yen a month, Standard 3,300 yen and Premium 16,500 yen, tax included. Minute and tick prices add 5,500 yen, company disclosures 11,000 yen |
| Limits | 50 requests a minute on free credit, 500 on paid credit. No overage charge | 5, 60, 120 and 500 requests a minute on Free, Light, Standard and Premium. Financial data endpoints stay at 60 a minute on every plan |
| Who it is for | Commercial apps allowed on every account | Individuals. Corporate and academic use goes through J-Quants Pro |
| Interfaces | REST and hosted MCP with 80 tools, one key for every Narwhal API | REST API with a Python client, an MCP option and a CLI, plus CSV downloads on paid plans |
Why teams switch
Your companies are not all in Japan
J-Quants covers Japanese listed companies. Narwhal reads Japan, Korea, the US, Taiwan, the EU and the UK in one schema, with one key and one credit balance.
You want to pay by the call
Narwhal charges $10 per 1,000 calls for company and filings data, and every account gets $10 free each month. J-Quants sells monthly plans, and its financial data endpoints are capped at 60 requests a minute on every plan.
When they are the better pick
J-Quants is the better pick for Tokyo market data. It returns daily prices for listed issues, TOPIX and index prices, futures and options, margin trading, short selling and investor type data. Narwhal Filings API carries none of that. Premium adds full balance sheet, income statement and cash flow data from 2009, and add-ons give minute and tick prices. Standard and Premium also serve ownership data taken from EDINET.
Questions
Does J-Quants include full financial statements?
Only on Premium at 16,500 yen a month. Every plan has summary financial data within its history window, from 2 years on Free to 20 years on Premium. Premium adds balance sheet, income statement and cash flow data. Narwhal returns standardised statements for over 3,800 Japanese companies on prepaid credit.
Can I use J-Quants in a company product?
J-Quants API is aimed at individuals, and its help page sends corporate and academic use to J-Quants Pro. The pages read give no J-Quants Pro price. Narwhal allows commercial apps on every account.
Does Narwhal return Japanese share prices?
No. The Filings API returns statements and filings, not prices. J-Quants returns daily prices for listed issues, delayed 12 weeks on the Free plan.
Does J-Quants use EDINET data?
Partly. Standard and Premium serve major shareholders, cross-shareholdings and large volume holding reports taken from EDINET. Narwhal serves statements and large shareholding reports from the same filing system.
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