Aso Bay is accessible by ferry, with routes available from Busan, South Korea, and other Japanese ports. The journey from Busan to Hitakatsu on Tsushima Island is a popular option, followed by a bus ride to Izuhara.

While there isn't an airport directly at Aso Bay, Tsushima Island has an airport (Tsushima Airport) that can be reached by domestic flights within Japan. The views from the plane are highly recommended.

Ferries to Aso Bay offer scenic views, and travelers recommend securing a window seat for the best experience. The journey can be long but is considered very pretty.

It is highly recommended to book ferry tickets in advance, especially during peak travel seasons, to ensure availability and avoid any last-minute issues.

Aso Bay itself is a natural area and generally does not have entrance fees. However, ferry tickets and any specific attractions or beaches within the bay area may have associated costs.

Visitors can enjoy the scenic beauty of the bay, take a ferry for stunning views, and visit nearby attractions like Komoda Beach in Izuhara.

While Aso Bay appears calm, the wind can be surprisingly strong. It's advisable to check conditions and local recommendations before swimming.

Pack layers of clothing to account for strong winds, even on seemingly calm days. Sun protection and comfortable walking shoes are also recommended.