March 14 is Pi Day, an annual celebration of the mathematical constant of pi, representing the ratio of a circle's circumference to its diameter. The holiday is observed on March 14 or 3/14 because 3.14 are the first three digits of the infinite number pi — 3.14159 ... and on and on.

At an event outside Tokyo in 2006, Akira Haraguchi set an unofficial world record for reciting the most digits of pi: 100,000 over more than 16 hours. So, how’d he do it? In his mind, he linked each digit with a syllable and created a collection of epic stories from the words those syllables formed.