Currency valuations are often abstract until they arrive at the lunch table. A strategist at Bank of New York Mellon has constructed a new measure of the yen's weakness — the Katsu Curry Index — by comparing the price of a beloved Japanese staple across global markets, and the result is a portrait of a currency trading at nearly two and a half times weaker than its purchasing power suggests it should be. Where economists see exchange rates, ordinary Japanese households see rising prices for meals they have eaten their whole lives, a quiet erosion of daily life that no intervention has yet mana
The Japan Times
· Aug 12, 2026
· economy
· 2 min de leitura
High
Apuração: Verificado
Katsu Curry Index reveals yen weakness Big Mac misses
Japanese households face rising costs for meals and consumer goods due to yen weakness, affecting purchasing power and affordability of daily necessities.
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Economy & Finance
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Viés e Enquadramento
⚖
Article presents a novel currency valuation tool with minimal editorial bias, though it emphasizes yen weakness through selective expert commentary without substantial counterargument.
Bias Direction
center-left
Confidence
MED
Expert-authority framing using an unconventional economic index to support a narrative of significant yen undervaluation; humanizes currency weakness through domestic cost-of-living impacts.
eye-watering expenses
hitting their wallets
becomes prohibitive
significantly undervaluing
Arguments from economists or policymakers defending current yen levels or intervention strategy
Perspectives on benefits of weak yen (export competitiveness, corporate profits)
Counterarguments to purchasing power parity as a valuation metric
Views from businesses or exporters who benefit from currency weakness
Alternative explanations for the yen's market valuation
Impacto Geopolítico
🌎
Yen weakness threatens Japanese domestic purchasing power, with currency significantly undervalued versus PPP metrics, potentially triggering policy pressure and affecting Japan-US economic relations.
Escalation Risk
moderate
Confidence
HIGH
Japan
United States
Global currency markets
East Asia
Japan's currency weakness reflects asymmetric economic pressure: while weak yen benefits Japanese exporters, it reduces Japanese consumer purchasing power and increases dependence on US monetary policy. Recent joint intervention by Japan-US authorities signals coordinated effort to stabilize yen, but market quickly reversed gains, suggesting limited policy effectiveness and potential friction over currency management between Tokyo and Washington.
Similar to 1980s Plaza Accord negotiations where coordinated G5 intervention aimed to weaken dollar; current situation inverted with Japan seeking yen strength but facing market resistance, risking renewed trade tensions if domestic inflation pressures mount.
Lente Econômica
📈
Yen significantly undervalued vs. purchasing power parity; weak currency inflating domestic prices for Japanese consumers, creating pressure for policy intervention.
Market Signal
bearish
Confidence
HIGH
Foreign Exchange Markets
Consumer Goods & Retail
Food Service & Restaurants
Tourism & Travel
Import/Export Trade
Japanese households face rising costs for meals, services, and consumer goods due to yen weakness. Domestic staples like curry rice becoming less affordable. Overseas travel and imported goods remain expensive, reducing purchasing power for international consumption.
Persistent yen weakness and domestic inflation may prompt Bank of Japan to reconsider monetary policy stance or coordinate further currency interventions. Political pressure likely to mount for measures protecting consumer purchasing power domestically. May influence trade policy discussions with trading partners.