1) JP Embassy got information that a Japanese who has ever entered in Thailand several times in the past tried to enter in Thailand recently without visa at Suvarnabhumi airport, however, the officer suspected "visa-run" and demanded such Japanese to explain the purpose to stay in Thailand in detail.
2) JP Embassy confirmed with TH Immigration and got reply that Immigration has tightened the passport control for visa run at airport as well since 16 March 2015.
3) JP Embassy would like Japanese to use visa exemption appropriately or get proper visa according to the purpose of visit to Thailand.
4) Please be noted that some people who shouted at officer or pounded on a counter at passport control were refused to enter in Thailand or were given over to the police with paying a fine.