Sumiyoshi-zukuri

Sumiyoshi-zukuri (住吉造) is an ancient Japanese Shinto shrine architectural style which takes its name from Sumiyoshi Taisha's honden in Ōsaka.

[1][3] The buildings had gabled roofs, raised floors, plank walls, and were thatched with reed or covered with hinoki cypress bark.

[1] Three important forms of ancient shrine architectural styles exist: taisha-zukuri, shinmei-zukuri, and sumiyoshi-zukuri.

[6] According to the tradition of Shikinen sengū-sai (式年遷宮祭), the buildings or shrines were faithfully rebuilt at regular intervals adhering to the original design.

The roof is simple, doesn't curve upwards at the eaves and is decorated with purely ornamental poles called chigi (vertical) and katsuogi (horizontal).