Dentsu Sports Singapore, the appointed marketing agency for the event and responsible for arranging the sponsorship deal, will also carry out Yakult's activation duties.
The sponsorship is on top of Yakult's support for two national championships - the Singapore National Age Group and Singapore National Swimming Championships.
"I am pleased that Yakult continues to see the merits and the returns of supporting swimming in Singapore, as its brand is instantly synonymous with the huge swimming fraternity here," explained Jeffrey Leow, president of the Singapore Swimming Association.
The FINA/Arena World Cup crosses six cities around the world where the best swimmers in the world compete for prizes and cash.
Alan Lim, group business director at Dentsu, said, "In the last two years, there has been an instant connect between Yakult and the swimming community here. The brand has adopted innovative on-ground activities to engage, particularly the juniors."