Yasuyoshi Shirasawa

Picea koyamae (Koyama's spruce; Japanese: ヤツガタケトウヒ or やつがたけとうひ yatsugatake-touhi) is a rare spruce, endemic to the Akaishi Mountains and Yatsugatake Mountains in central Honshu, Japan. It is an evergreen tree growing to 25 m (82 ft) tall, with a trunk diameter of up to a metre. It grows in small isolated stands in a limited area and the total area of occupation is less than 100 square kilometres (39 sq mi). Trees that are lost to typhoons are normally replaced with other faster-growing species and the International Union for Conservation of Nature has assessed the tree as being "critically

Tilia maximowicziana is a species of flowering plant in the lime and linden genus Tilia, family Malvaceae. It is native to central and northern Japan, and Kunashir Island, the southernmost of the Kuril Islands. In the mountain forests of Hokkaido and northern Honshu it is often a dominant canopy species. A handsome tree, little planted outside its native range, it is available from commercial suppliers.

Tilia kiusiana, the Kyushu lime, is a species of flowering plant in the family Malvaceae. It is native to southern and central Japan, and introduced to the Korean Peninsula. It has a number of features that make it "potentially the next great landscape tree", including small, narrow leaves that are not the typical linden shape, a refined growth habit, attractive exfoliating bark, aphid resistance, and slow growth to a medium size. Hardy to zone 6, it is available from commercial nurseries.

Pseudotsuga japonica, the Japanese Douglas-fir, is a species of conifer in the pine family, Pinaceae, that is endemic to Japan. It is a medium-sized tree growing to 25 m (82 ft) tall. Japanese calls this tree togasawara (Japanese: トガサワラ).

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