Mount Rai, Mountain summit in Itoshima and Saga, Japan

Mount Rai is a summit in the Sefuri Mountain range that marks the natural boundary between Fukuoka and Saga Prefectures. The mountain sits within the Itoshima and Saga area and is accessed by marked hiking trails leading to a viewpoint at the top.

Since ancient times the whole mountain has been venerated as the seat of Raijin, the thunder god, which is said to give Mount Rai its name. The summit shrine, Ikazuchi-jinja jō-gu, keeps three small stone shrines (ishidō) in the innermost part of the grounds. The grassland just below the 950 m top, Sosogino, is linked in local tradition to Empress Jingū, and the mountain is also called Sosogi-dake after it.

The summit holds a small Shinto shrine dedicated to Raijin, the Japanese god of thunder, from whom the mountain takes its name. Reaching the top, visitors find a quiet spot that still carries religious meaning for people in the surrounding region.

The trail to the top starts at Raizan Kannon-mae Bus Stop and follows a marked path up the mountain. Sturdy footwear and weatherproof clothing are recommended, as conditions can change quickly at this elevation.

The summit holds three small stone shrines of Ikazuchi Shrine's upper sanctuary, set in the grassland called Sosogino below the 950 m top. The field's name gives the mountain its alias, Mount Sosogi, and is linked in local tradition to Empress Jingū.