Japanese marathon runner Yuki Kawauchi received a certificate from Guinness World Records in his hometown on Sunday recognizing him for completing the highest number of marathons in under 2 hours and 20 minutes."I'm very happy but this is still a passing point," said Kawauchi, known as the "public servant runner," who has achieved 78 sub-2:20 marathons. "I'm now aiming to reach 100 (sub-2:20s) to be called the hard-bitten Kawauchi."Kawauchi, 31, works full time as a civil servant in Saitama Prefecture near Tokyo. He first achieved a sub-2:20 time in his first marathon in February 2009 when …READ FULL ARTICLE