Alexandre Gervais

The lantern was introduced to Japan at the same time as Buddhism, in the 6th century. The ishi-doro or stone lantern is the most common type, gracing gardens, temples and shrines throughout Japan. Ishi-doro come in many different sizes and shapes, but common to them all is a hollowed upper part, made to hold electric lights, candles, or oil lamps, lighted on special occasions. The Japanese Connection

Originally used in the broad sense to mean any lantern, the word tōrō came to mean a lamp of stone, bronze, iron, wood, or another heavy material. These illuminate the grounds of Buddhist temples, Shinto shrines, Japanese gardens, and other places that include tradition in their decor. The earlier oil and candles have given way to the electric bulb.Wikipedia