The Japanese yen rose on Monday, rebounding from a more than eleven-month low hit in the prior session, as authorities signaled a possible intervention. Top currency diplomat Atsushi Mimura emphasized that officials would take “appropriate” action against excessive exchange-rate movements, reflecting concern over sharp, one-way trends. His comments followed remarks by Finance Minister Satsuki Katayama, who warned that Japan would respond to speculative moves in the yen, highlighting worries about surging import costs and their impact on households. The intervention watch comes in the wake of the recent BOJ interest rate hike to 0.75%, marking the highest borrowing costs since 1995. BOJ Governor Kazuo Ueda is scheduled to speak to Keidanren business lobby on Christmas Day, giving markets another chance to look for policy signals. Meanwhile, the yen remained near historic lows against the euro and Swiss franc, as the rate hike did little to support the currency.