Tokyo Bay area property prices stand to benefit the most in the lead-up to the 2020 Olympic Games, adding to the recovery in the capital's real estate values after 20 years of declines.

About 90 percent of the competition venues will be located within 8 km of the Olympic Village in Harumi, an area of reclaimed land about 3.2 km southeast of central Tokyo, according to the Tokyo 2020 Bid Committee.

Apartment prices in the area may increase by as much as 20 percent, said Sanyu Appraisal Corp., a property appraisal company.