Kit Kat in Japan sounds like 'surely win' — Nestlé discovered the name by accident

Kit Kat was created in 1935 by Rowntree's in York, England, as a chocolate wafer bar. The name was chosen by Rowntree's — reportedly inspired by the Kit-Cat Club, a London literary and political club from the 18th century. The bar was sold in the UK, Europe, and Commonwealth countries for decades with no particular meaning in any language.

Nestlé acquired Rowntree's in 1988 and began expanding Kit Kat globally, including in Japan. Kit Kat had been available in Japan since the 1970s under license. At some point — the exact moment is not documented — someone at Nestlé or a Japanese distributor noticed that 'Kit Kat' sounds like the Japanese phrase 'Kitto Katsu' (きっと勝つ), which means 'surely win' or 'you will surely win.' The coincidence was not intentional; the name was chosen decades earlier in England with no knowledge of Japanese.

Nestlé Japan leaned into the discovery. The company began marketing Kit Kat as a good luck gift for exam students, with special packaging and limited-edition flavours. The campaign was a breakthrough. Kit Kat became a cultural phenomenon — students and their families bought the bars before exams as a symbolic gesture of encouragement. The brand was repackaged, reimagined, and relaunched with hundreds of local flavours (matcha, wasabi, sake, and over 300 more). A chocolate bar named after a London club became a Japanese exam tradition.