Thuja standishii, commonly known as Japanese Thuja, is an evergreen tree native to mountain forests and often found in riparian zones in Japan. This species is a medium-sized conifer, typically reaching heights of 20–35 meters with a trunk diameter up to 1 meter. Its foliage, which forms in flat sprays, consists of scale-like leaves that are 2–4 mm long, presenting a matte green color on the upper side and narrow white stomatal bands on the underside. The cones are distinctive, starting as oval, yellow-green, and ripening to red-brown, measuring 6–12 mm long and 4–5 mm broad, expanding to 8 mm when open, with 6–10 overlapping scales.

Japanese Thuja is valued for its durable and waterproof wood, which emits an attractive scent, making it a significant timber tree in Japan. In cultivation, it is used for ornamental purposes, including urban planting, and as a specimen tree in large gardens. It is appreciated for its ease of maintenance and the textural quality of its foliage. Japanese Thuja requires full sun to part shade and well-drained soils for optimal growth. While it is not known for serious pest or disease problems, it can suffer from root rot if planted in poorly drained soils.CC BY-SA 4.0