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The Osaka Expo was held in 1970, and it was around this time that the idea of bringing the Ocean Expo to Okinawa started being discussed.

With Okinawa’s imminent “reversion” to Japan, development plans centered on infrastructure improvements were starting to materialize in anticipation of the economic benefits that would follow the reversion.

The rapid changes to the natural environment that accompanied the development raised concerns, and coincided with opposition to the construction of an oil storage base in Kin Bay.

Furthermore, the oil crisis caused the government to reconsider going ahead with the Expo. However, after a four-month postponement, the Ocean Expo eventually opened in 1975.

This large-scale development  transformed the landscape in many places.

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