隣の客はよく柿食う客だ (Tonari no kyaku wa yoku kaki kuu kyaku da)
Meaning: A tricky spiral on ka/ki/ku that accelerates as you try to keep the syllables distinct.
Language: Japanese
Literally: The customer next door is a customer who often eats persimmons.
Category: Fiendish
Origin: A staple of Japanese tongue-twister collections.
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