16th April, Bangkok: Debutant, Naoki Tachibana of Japan had a narrow victory in the Men's Grade B Masters finals of the 50th MWA-Thailand International Open Bowling Championships ahead of Le Hoang Khoi of Vietnam in second and newly-crowned Men's Grade A champion, Chen Kuan Lun of Chinese Taipei in third.

Lee Cheng En of Chinese Taipei set the early pace to lead the field with a scintillating 268, 11 pins ahead of fellow-countrymen, Chen Kuan Lun in second. Aqif Danial Bin Shaifulazmi of Malaysia was third with 230. Chen shot into the lead with 214 in his second game.

Lee Jong Seng of Korea moved into second with 237 following his 225 opener. Lee slipped down to third. Newcomer, Naoki Tachibana of Japan rolled a big game of 267 in the third game to take over the running. Chen trailed in second, 12 pins adrift.

The Japanese added 234 at the halfway mark to continue to lead the pack. Lee moved up to second while Chen dropped down to third. Le Hoang Khoi shot back-to-back 256 to become the new leader. The Korean trailed in second, 14 pins behind.