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- Botanical Name: Cryptomeria japonica
- Synonyms: Cupressus japonica L.f.
- Common Name: Japanese Cedar, Japanese Red Cedar
- Seeds collection period: December
- Seeds longevity: 1 year
Cryptomeria japonica is an evergreen tree that grows to a height of 35-60 m and attains a bole diameter of 1-3 m. Trunk straight, in old trees massive, buttressed; bark thin on young trees, smooth, purplish-brown, on large trees 2-3 cm thick, reddish-brown, weathering grey, exfoliating in long, shredding strips. Branches spreading to assurgent, forming a conical crown in young trees, self-pruning to leave a clear bole in large trees. Branch foliage dense, with leaves lasting 6-12 years, shedding not individual leaves but ultimate lateral branchlets which persist 4-8 years, these variable in length, spreading but incurved in various degrees, directed forward, linear-subulate, slightly flattened laterally, distinctly keeled abaxially, leathery, stiff, green, 3-20 by 1-2 mm, apex acute; in juvenile leaves there are 2-3 resin ducts, in mature leaves this number is usually reduced to a single duct on the abaxial side of the stele.
- Timber: Trees grown in India produce soft, light and fragrant wood. The sapwood is white, heartwood is reddish brown and sometimes even black as in aged trees in Japan. The timber is extensively used in Japan for staves, tubs, casks, for building and furniture. It is durable, easy to preserve, saw and season. It is used for light construction, boxes, veneers and plywood. Old wood that has been buried in the soil turns a dark green and is then much esteemed.
- Medicine: Oil and/or a resin from the plant is depurative and also used in the treatment of gonorrhoea.