Japan's #1 grocery swap isn't meat — it's butter to margarine. We unpack the inflation data, the booming premium butter sweets market, and why this simple spread reveals a deeper economic divide in Japanese consumer culture.

◆Introduction: One spread, two economies — how inflation split Japan's butter and margarine markets in opposite directions.

In a blind taste test, most people can't tell butter from margarine. Yet a survey of 33,000 Japanese consumers found that switching between them is the nation's top inflation response. Meanwhile, premium butter confectionery is exploding — turning dairy waste into thousand-yen luxury gifts. This episode explores the surprising economics behind Japan's quietest food rivalry.

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