The Bank of Japan's decision on monetary policy, announced on Tuesday, has heightened expectations of a potential increase in borrowing costs by the end of Q2. The yen has responded positively, while bitcoin continues to face challenges. The central bank opted to maintain its benchmark interest rate at 0.75%, as widely anticipated. However, the decision was not unanimous, with three board members advocating for an immediate rate increase.

This 6-3 vote split marks the largest division since Kazuo Ueda assumed the role of governor, indicating a growing inclination among policymakers to raise borrowing costs. The Bank of Japan also revised its forecast for core inflation to 2.8% for the current fiscal year and adjusted its economic growth projections downward to 0.5% from 1%. The reasoning behind the Bank of Japan's shift towards a more hawkish stance is largely attributed to disruptions in global energy prices due to war-related conflicts, which have resulted in increased inflationary pressures in energy-import-dependent economies like Japan. In response, traders have priced in a 74% chance of a rate hike on June 16, aligning with the consensus among Bank of Japan observers.

The Japanese yen has seen a significant surge, causing the dollar-yen pair to decline by nearly 0.5% to 158.95. The bitcoin-yen pair listed on bitFlyer has also experienced a 0.6% decline to 12.28 million yen, consistent with the weakness in dollar-denominated prices.

Trends in the Japanese yen are closely monitored due to its historical role as a funding currency. Prolonged yen strength is often associated with risk aversion, as the Bank of Japan's extended period of ultra-low interest rates has encouraged traders to borrow in yen and invest in higher-yielding assets abroad.

As a result, yen strength can trigger the unwinding of these carry trades, potentially leading to global risk aversion. However, recent market flow data suggests that yen-funded carry trades remain active, with Japan continuing to increase its holdings of U.S. Treasury notes.