Diamond Beach is generally safe for swimming during calm weather, but be mindful of the unique rock formations that give the beach its character. These rocks can create unpredictable currents in certain areas. Swimming is most recommended during summer months when lifeguards are typically present. Always check local conditions before entering the water, especially after storms or during high winds. The rocky areas are best appreciated from shore rather than navigated while swimming.

Diamond Beach is renowned for spectacular sunsets, with the best viewing periods from late spring through autumn (May to October). Summer evenings offer the longest daylight, while autumn provides clearer skies and more dramatic colors. Arrive at least 30 minutes before sunset to secure a good position and capture the changing light on the rock formations. The beach faces west, making it ideal for sunset shots. Golden hour during these months creates particularly Instagrammable moments that justify the beach's reputation.

Diamond Beach is located in Mihama, Fukui Prefecture, along the Wakasa Bay coast. The most convenient access is by car, as public transportation options are limited in this coastal area. If using public transport, take the JR Obama Line to Mihama Station, then a local bus or taxi to the beach. Driving from Fukui City takes approximately 90 minutes. Parking is available near the beach, though it can fill quickly during peak summer weekends and sunset hours.

Mihama offers various accommodation options ranging from traditional Japanese inns (ryokan) to modern hotels, many featuring fresh Wakasa Bay seafood. Several guesthouses and minshuku provide budget-friendly stays with home-cooked meals. The town has local restaurants serving regional specialties, particularly seafood caught from Wakasa Bay. For more dining variety, the nearby Obama City offers additional choices. During peak season, booking accommodations in advance is strongly recommended, especially if you want beachfront or sunset-view rooms.

The dramatic rock formations at Diamond Beach create distinctive silhouettes against sunset skies, making them the beach's signature feature. These naturally sculpted rocks have been shaped by wave action over thousands of years, creating photogenic formations that appear to sparkle during certain light conditions—hence the "diamond" name. The rocks provide excellent foreground subjects for photography and add character that distinguishes this beach from other sandy stretches along the Fukui coast. They're particularly striking during golden hour.