Raseimon

Overview

Raseimon is a massive stone arch, approximately 40 meters high, located on the Kusama plateau, a karst landscape in the southern part of Niimi City, Okayama Prefecture. Formed hundreds of thousands of years ago when a cave collapsed, leaving behind this breathtaking structure. The arch is actually a series of arches, from the First Gate to the Fourth Gate, culminating in Raseimon First Cave, a sinkhole. The cool air emanating from the cave creates a unique, cool and humid environment, nurturing a diverse array of rare plants and animals, including globally rare moss species. The name "Raseimon" (literally, "Rashomon Gate") is said to either refer to the moss hanging from the rocks and trees like a thin gauze (usuginu, 羅), or the atmosphere reminiscent of Ryunosuke Akutagawa's famous story, "Rashomon". The area surrounding Raseimon is cool even in summer, making it a popular summer resort. Well-maintained hiking trails allow visitors to enjoy a leisurely walk while immersing themselves in nature. Designated a national natural monument, Raseimon is a precious natural heritage, carefully protected. Visitors are asked to maintain proper etiquette and show consideration for the natural environment during their visit.