How often does the yen rate change?

The yen rate changes continually while markets are open, but this site's converter updates once each working day. It shows the European Central Bank's reference rate, which the ECB says is usually updated at around 16:00 CET every working day, with the date printed beside the figure. Other tools refresh more often, and some update only once a day. Check how recently any tool updated its figure and where the data comes from before relying on it, particularly for a large decision.¹