Japan’s central bank just pushed interest rates to a level the country hasn’t seen in over 30 years. The Bank of Japan raised its short-term policy rate by 25 basis points to 1% on June 16, marking the highest rate since 1995 and continuing a deliberate march away from the ultra-loose monetary policy that defined Japanese economics for a generation.

The rate increase follows a prior 25 basis point hike to 0.75% in December 2025, which was approved by a unanimous vote. The BOJ has now raised rates twice in roughly six months, signaling that this isn’t a one-off adjustment but a sustained policy shift.

The driving forces are familiar: persistent inflation fueled by yen depreciation and rising energy costs, with geopolitical tensions in the Middle East adding pressure to the mix.

Here’s a detail that would normally be headline news on its own: Governor Kazuo Ueda wasn’t even in the room. He was hospitalized for an infected liver cyst, meaning the BOJ proceeded with its most significant tightening cycle in three decades without its top official present.

The BOJ has also indicated it plans to keep raising rates while maintaining its bond purchase program, tightening on the short end of the yield curve while trying to prevent chaos on the long end.

The yen carry trade problem

The yen carry trade is one of the largest and most consequential trades in global finance. The mechanics are simple: borrow yen cheaply, convert it to dollars or other higher-yielding currencies, and invest in riskier assets. When Japanese rates were near zero, this trade was essentially free money. At 1%, the math starts changing.

Yen short positions have reached a nine-year peak heading into this decision. If the yen rallies sharply in response to higher rates, traders holding those short positions need to buy yen to cover their losses, which pushes the yen higher, which forces more covering.

Crypto markets felt this exact dynamic play out in August 2024, when a previous BOJ rate hike triggered a yen carry trade unwind that rippled across global markets. Bitcoin dropped alongside equities as leveraged positions across asset classes got liquidated.

Market-implied probability of the hike exceeded 99% ahead of the decision, meaning a 99%-plus probability was priced in ahead of time, leaving very little room for surprise.

What this means for crypto investors

Japan is the last major economy to normalize monetary policy after the era of zero and negative interest rates. Bitcoin and other risk assets have historically thrived in environments of expanding liquidity and struggled when that liquidity contracts.

With yen shorts at multi-year extremes and Bitcoin’s correlation to macro liquidity conditions well established, the carry trade unwind scenario remains the single biggest Japan-related risk on crypto traders’ radar heading into the second half of 2026.