Regarding ocean space utilization, many plans have been proposed for floating airport, container terminal, energy facilities and oil storage basis etc. from the viewpoint of their advantage of being earthquake free and away from an urban area. In case facilities are constructed independent from shore, the investigation on access facilities is dispensable. Bridges, landing piers and tunnels are constructed as access facilities, but they have own difficulties due to deep water, soft ground condition and ground subsidence. In case of passage way of airplane, there is severe restriction and requirement in inclination of passage, and has not been discussed specifically in this viewpoint. In this report, the required functions for floating access facilities are reported and technical countermeasure and applicability are considered.