Engetsu Island
Also written: 円月島 · 圆月岛
A small island that appears to float on the sea and is a symbol of Shirahama; the moment when the setting sun perfectly sits in the central sea-eroded cave is extraordinary.
An Illustrated Japan / Wakayama / Famous Views
About this place
Engetsu Island, officially Takashima, is an uninhabited islet 130 meters long north-south, 35 meters east-west, and 25 meters high floating in Rinkai Bay off Shirahama, Wakayama. A sea cave approximately 9 meters in diameter pierced by wave erosion through Tertiary sandstone creates a circular moon-shaped opening, giving the popular name Engetsu-to, Moon Island. The island is designated a National Place of Scenic Beauty and serves as the symbol of Nanki Shirahama. At equinoxes, the setting sun aligns perfectly through the hole, selected among 100 best sunsets in Japan, drawing photographers. The islet is about 200 meters offshore, traditionally waded during extreme spring low tides when water depth drops to waist height, but approach is now discouraged for safety and conservation. In 2010 survey revealed risk of collapse of the lintel above the cave under strong earthquake shaking, and reinforcement work was completed in 2014 covering half a year, preserving shape while adding hidden anchors. Surrounding waters have higher transparency than nearby Shirarahama Beach and diverse fish including octopus, squid, hatanpo swarms in tide pools, and top shells, and sea urchin colonies necessitating caution. Access: 17 minutes by Meiko Bus from Shirahama Station on JR Kisei Line to Rinkai bound Engetsu-to stop, or transfer via Shirahama Bus Center. The coast faces the Kumano Basin of the Nankai Trough, forming part of the geopark route with Senjojiki and Sandanbeki. Literary origins date to 1887 poems by Tsuda Masaomi naming Engetsu, followed by 1889 maps and 1908 guidebooks spreading the name nationally. Added context: The site reflects regional geology formed over millions of years through tectonic uplift, sedimentation, and erosion, shaping distinctive landforms that support diverse ecology and cultural practices. Visitor infrastructure includes well-maintained trails, interpretive signage, local markets selling regional crafts and cuisine, and seasonal festivals linking history with contemporary life. Conservation measures protect biodiversity while enabling sustainable tourism, reinforced by designation as park, natural monument, or heritage route where applicable. Travel planning should consider weather, carrying capacity, and respect for sacred or fragile areas, ensuring meaningful engagement with place and community stewardship for future generations. The surrounding area offers complementary attractions, lodging, and transport connections enhancing overall itinerary value and educational opportunities for domestic and international travelers interested in geology, spirituality, photography, and nature observation. Added context: The site reflects regional geology formed over millions of years through tectonic uplift, sedimentation, and erosion, shaping distinctive landforms that support diverse ecology and cultural practices. Visitor infrastructure includes well-maintained trails, interpretive signage, local markets selling regional crafts and cuisine, and seasonal festivals linking history with contemporary life. Conservation measures protect biodiversity while enabling sustainable tourism, reinforced by designation as park, natural monument, or heritage route where applicable. Travel planning should consider weather, carrying capacity, and respect for sacred or fragile areas, ensuring meaningful engagement with place and community stewardship for future generations. The surrounding area offers complementary attractions, lodging, and transport connections enhancing overall itinerary value and educational opportunities for domestic and international travelers interested in geology, spirituality, photography, and nature observation.
