RetireJapan

I recently found out that Portfolio Visualiser supports importing time series and defining new symbols, so in theory I could use it to compare Japanese portfolios.

However, I don't know any open data source or API I could fetch past data from.

Do you any?

Thanks.

There is no single API that I know of.

CSV files of eMAXIS Slim and MAXIS ETF prices can be downloaded from their respective websites.
MSCI index data is downloadable as excel files here.
Historical Yen/USD exchange rate data is available from FRED.
US-based stocks/ETFs/index data is available from Yahoo Finance.

If anyone knows of any other sources/APIs, it would be useful to collect & summarize these in this thread and on the wiki.

All Japanese Yen Historical Cross Rates are available from MUFG here

http://www.murc-kawasesouba.jp/fx/past_3month.php

At the bottom select the year 1990 to 2021 available...

you can download csv from market watch. for example
https://www.marketwatch.com/investing/s ... _quote_tab

Yahoo Finance also has API which you can use python or javascript to access
https://pypi.org/project/yfinance/
https://www.npmjs.com/package/yahoo-finance2

Perhaps you might find some of these link useful? (at the bottom).

It lists the research organizations that are connected to the TSE.

https://money-bu-jpx.com/etf/