Japan’s National Consumer Price Index (CPI) rose 1.4% year-on-year in April, down from 1.5%, according to Japan’s Statistics Bureau. National CPI excluding fresh food was 1.4% year-on-year, compared with 1.8% previously and below the 1.7% forecast.
CPI excluding fresh food and energy increased 1.9% year-on-year in April, down from 2.4%. After the release, USD/JPY was up 0.03% on the day at 158.97.
Inflation And Core Inflation Explained
Inflation refers to rising prices across a basket of goods and services, often shown as month-on-month and year-on-year rates. Core inflation removes items such as food and fuel, which can be volatile, and central banks often aim for about 2%.
CPI tracks price changes in that basket over time, while core CPI excludes food and fuel inputs. Core CPI above 2% is often linked with higher interest rates, while lower readings are linked with lower rates.
In foreign exchange markets, higher inflation can lead to higher interest rates and a stronger currency, while lower inflation can have the opposite effect. For gold, higher interest rates raise the cost of holding a non-yielding asset, while lower rates can support demand.
As we look at today’s date of May 22, 2026, the inflation data from two years ago in April 2024 offers a valuable lesson. At that time, core inflation unexpectedly slowed to 1.4%, feeding doubts about the Bank of Japan’s ability to raise interest rates aggressively after its historic policy shift in March 2024. This softness in price pressures encouraged traders to bet against the yen, as the interest rate gap with other countries remained wide.
That weak inflation signal from 2024 proved to be a key driver for the yen’s path. It confirmed that the Bank of Japan would proceed with extreme caution, keeping its policy rate near zero for much longer than other central banks. This sustained the environment for the yen carry trade, where investors borrow yen cheaply to invest in higher-yielding currencies, pushing USD/JPY above the 160 level and triggering government intervention.
Options And Volatility Risk Management
Fast forward to today, the situation has evolved but the core dynamic remains. Japan’s latest core CPI for April 2026 now stands at a more persistent 2.5%, finally holding above the central bank’s target. Yet, the Bank of Japan has only managed to raise its policy rate to 0.5%, a stark contrast to the U.S. Federal Reserve’s rate which is currently holding at 4.75%.
This persistent and massive interest rate differential continues to put downward pressure on the yen. For derivative traders, this means the primary trend of selling the yen likely continues in the coming weeks. However, the risk of sudden and sharp yen appreciation from official intervention is now an established market factor, creating significant volatility.
Given this, we should consider using options to manage the risks of a volatile yen. Buying out-of-the-money put options on USD/JPY can provide a cost-effective hedge against any surprise government action to strengthen the currency. This allows participation in the yen’s weakness while capping potential losses from a sudden reversal.
Implied volatility in USD/JPY options remains structurally higher than it was before 2024, reflecting the market’s memory of intervention. Traders should watch for periods when volatility becomes unusually cheap, as these could present prime opportunities to build defensive positions. The key is to trade the slow grind of yen weakness while staying protected from its sharp, unpredictable bounces.
