Adult tickets for the 2025 World Expo in Osaka are set to cost ¥7,500 ($50), its organizing association said Wednesday, representing a 25% rise from the initially proposed ¥6,000 price tag.

Tickets are set to cost ¥4,200 for visitors between ages 12 and 17 and ¥1,800 for those between 4 and 11, while those age 3 and under can enter for free, the Japan Association for the 2025 World Exposition said during a news conference.

There also will be discounts available depending on when people visit, it said.

"We would like many children to come and visit, which is why we decided on pricing it this way," said Masakazu Tokura, chairman of the association.

The revenue generated from the tickets will largely go toward covering the event's operational and security costs, which are likely to balloon from the initial estimate of ¥80.9 billion due to rises in commodity prices and wages.

Tickets are slated to become available at the end of November, 500 days before the expo opens on April 13, 2025, with visitors able to purchase electronic tickets six months in advance.

The expo will run until Oct. 13, 2025, on Yumeshima, an artificial island in Osaka Bay, centered on the theme of "Designing Future Society for Our Lives."

Japan last held a World Expo in 2005 in Aichi Prefecture, when adult tickets were priced at ¥4,600.