Discussions between officials from the prefecture and their counterparts from its capital Nagoya stalled last week as the prefecture had not yet come up with detailed estimates to help them identify how costs would be split.
Aichi's prefectural government has since indicated to Nagoya that total costs are estimated to reach roughly 85 billion yen (626 million pounds).
About 25 billion yen is expected to be covered by sponsorships and other revenue, with the prefecture paying two-thirds of the remainder and Nagoya the rest.
The JOC is scheduled to take a decision on Japan's candidate site for the 2026 Asian Games later on Tuesday.
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The Olympic Council of Asia is expected to select the host location at a meeting scheduled for Sept. 25 in Danang, Vietnam.
Japan last hosted the Asian Games in Hiroshima in 1994. The next Games will be held in Indonesia's Jakarta and Palembang from Aug. 18 to Sept. 2, 2018.
(Reporting by Simon Jennings in Bengaluru; editing by Sudipto Ganguly)
