Hayashi, who topped the Boy's opening squad with 1460 remained unbeaten to capture the gold medal. Alex Yu of Hong Kong A, who finished second to Hayashi, retained second spot to take home the silver medal with 1351.
2017 Hong Kong Asian School Singles gold medallist, Kenzo Umali of Philippine A, who won the second squad with 1345, settled for the bronze medal. Umali had led the first three games of the second squad with 246, 203 and 216 but lost the lead to Kyle Annetts of Australia A after fourth and fifth games.
The 16-year-old Filipino ended stronger than the Aussie to clinch the squad victory. Takumi Shinsha of Japan finished second to Umali with 1330 and missed the podium by 15 pins to end in fourth overall.
Danielle Evangelista of Philippines A, who was third in the second squad, completed the top 5 with 1316. Owen Wong of Singapore B, who was third in the first squad with 1307, ended up in sixth position behind Evangelista.