BlackRock portfolio manager Rie Shigekawa has expressed concerns about potential risks to the yen if the Bank of Japan does not adequately prepare the market for a possible interest-rate hike in June. Bloomberg posted on X, highlighting Shigekawa's warning that the yen could face volatility if the central bank's communication is not clear and effective. The Bank of Japan's upcoming policy meeting is being closely watched by investors, as any changes in interest rates could significantly impact currency markets. Shigekawa emphasized the importance of clear guidance from the Bank of Japan to mitigate potential market disruptions.