空気神社, Modern shrine monument in Asahi Town, Japan

The Air Shrine is a monument on a small hill in a beech forest in Asahi, Yamagata Prefecture. At ground level, a 5-meter square of mirror-polished stainless steel reflects the trees and sky. Beneath it lies a 4.3-meter square, 3-meter-deep chamber with four torii-shaped pillars and twelve unglazed clay jars set into the floor to amplify footsteps.

Chiyoo Shirakawa, a resident of Asahi and member of a forestry cooperative, first proposed a shrine to thank the air in 1975 in the town bulletin. Preparations began in 1987 as part of the town's Nature Observation project, and a design competition was held in December 1988, won by Kenji Yatsu of Tohoku Institute of Technology. Construction started on 24 April 1990 and the worship hall was completed on 27 July 1990.

The name comes from Chiyoo Shirakawa's idea of thanking the air; he proposed it in the town newsletter in 1975. The shrine is not a religious site but a monument run by the town's tourism association. On 5 June, Air Day, the underground hall opens and local schoolchildren perform a miko dance.

The monument stands at the top of a small hill covered in beech forest inside the Asahi Nature Park grounds. From JR Sagae Station on the Sagae Line, take a Yamako bus bound for Miyashuku (about 21 minutes), then a taxi for roughly 20 minutes; by car it is about 40 minutes. The underground chamber opens to visitors only on Air Day, 5 June, and the nearest weekend, through an interpreter.

The underground sanctuary holds twelve unglazed clay jars, one for each month of the year, set into the earth to amplify sound. The chamber itself is a wine-coloured structure of four torii gates joined together, and it opens to visitors only once a year, on 5 June, the town's Air Day.