How sensitive is short-term Japanese interest rate volatility to the level of the interest rate?

The sensitivity of volatility to the level of the interest rate is well documented in the literature. We investigate whether such results are robust over a range of maturities ranging from seven days to twelve months and whether these findings hold for offshore Japanese yen rates. The volatility is sensitive to level of the rate itself for every maturity examined. (C) 1997 Elsevier Science S.A.