Sanninudai is located on the north shore of Yonaguni Island. It's best accessed by car or rental scooter. Public transportation is limited on the island, so having your own transport is highly recommended for exploring Sanninudai and other attractions.

Public transport on Yonaguni Island is sparse. While there might be infrequent bus routes that pass near the general area, it's not a reliable way to reach Sanninudai directly. Renting a car or scooter is the most practical option.

Sanninudai is a natural scenic spot and typically does not have an entrance fee. Access to the observation areas is generally free.

As an outdoor natural attraction, Sanninudai does not have set opening or closing hours. You can visit at any time, though daytime is recommended for the best views.

Access to the Gunkan-iwa rock formations themselves, and any paths leading down to them, may be closed for safety reasons due to crumbling structures. Always check for signage indicating closures.

The main observation deck provides excellent vantage points for photographing Gunkan-iwa rock and the dramatic north shore coastline.

Daytime, particularly during the golden hours of early morning or late afternoon, offers the most dramatic lighting for capturing the rugged landscape and the unique shape of Gunkan-iwa.