The Japanese yen weakened sharply against the US dollar, sliding to a two-week low after Japan’s national Consumer Price Index (CPI) data disappointed market expectations for stronger inflationary pressure. The USD/JPY pair rose to 159.7, slightly below the year-to-date high of 160.43, reflecting continued yen softness amid rising energy costs and geopolitical tensions stemming from the US-Iran conflict.
Japan’s headline CPI rose 1.5% in March, up from 1.3% in February, while core inflation — excluding volatile food and energy prices — increased to 1.8% from 1.6%. Although inflation is moving higher, it remains well below levels seen in the US and other major economies. The Bank of Japan (BOJ) under Governor Kazuo Ueda has adopted a more hawkish tone, raising interest rates from zero in 2024 to 0.75% today — the highest in three decades. However, the latest CPI data reduces the urgency for immediate further rate hikes.
Energy prices are a key factor driving inflation in Japan, which relies heavily on oil imports. Brent crude has surged to $106 per barrel from a monthly low of $85, and West Texas Intermediate is approaching $100. Japan is now forced to buy more oil from alternative sources, including the US, where exports have climbed. Higher transport and household costs are squeezing consumers, and the situation is expected to worsen in April as oil prices continue to rise.
The BOJ faces a delicate balancing act. Hiking rates further would help contain inflation but risk slowing an already fragile economy that grew just 0.3% quarter-on-quarter in Q4 2024, after contracting 0.7% in the prior period. The International Monetary Fund (IMF) has pushed for tighter policy, but the central bank remains cautious.
Meanwhile, the Federal Reserve is expected to keep rates unchanged as US inflation has jumped to 3.3% in March. The wide interest rate differential between Japan (near-zero rates) and the US (high rates) continues to favor the dollar, keeping the yen under sustained pressure.
From a technical perspective, USD/JPY has broken above key resistance at 159.32, the January 2026 high, and remains above the 50-day and 100-day exponential moving averages — a bullish signal. The pair has formed an inverted head-and-shoulders pattern, suggesting further upside toward the 160 level. A move above 160 could trigger BOJ intervention, as officials have historically stepped in to support the yen when depreciation becomes too rapid.
The yen’s weakness benefits Japanese exporters like Toyota and Sony, whose overseas profits are boosted when converted back to yen. However, importers suffer from higher energy and raw material costs, squeezing margins and raising consumer prices. The government is monitoring the situation closely and has increased verbal intervention to prevent excessively fast declines.
