The current exchange rate for the Japanese Yen (JPY) is 144.778504 JPY per American Dollar (USD), as of the time this was written. The JPY reached a high of 144.7785 JPY per USD, and a low of 131.5750 JPY per USD during the last 90 days. The average exchange rate for the JPY was 138.2561 JPY per USD for the last 90 days.
The average volatility rate of the JPY against the USD was 0.24% over the last 90 days. This is a moderate volatility rate, and while the JPY has fluctuated in recent years, it is not to a significant extent for the purposes of sending money. You can reasonably expect only moderate fluctuations going forward, barring any unforeseen circumstances.