Characteristics of patients tested for Japanese cedar pollinosis.

Preface: Functional biogeography in Japanese cedar

“…In other words, the cedar has replaced the natural forests of the past as the main component of planted forests. In the process of afforestation, attention has been focused on high growth rates and good wood quality (Sakaguchi, 1983), and little attention has been paid to the various other functional differentiation unique to each region. The effects of the cedar species on the nutrient cycling and soil faunal community differ among artificial cultivars (Ohta & Hiura, 2023).…”

“…The most dominant gymnosperm in Japan (Forestry Agency, 2011), the Japanese cedar, is also widely distributed in the warm and cool‐temperate zones of the Japanese archipelago, from Yaku island (30° 0 15′N, 130°30′E) to Ajigasawa (40°42′N, 140°12′E) (Hayashi, 1960). It is one of the most investigated tree species in Japan due to its large biomass accumulation and usefulness in forestry (e.g., Osone et al, 2020; Sakaguchi, 1983). Its amount of academic information is comparable to that of the European beech ( Fagus sylvatica ), the Scots pine ( Pinus sylvestris ), and the Norway spruce ( Picea abies ) in Europe (e.g., Benavides et al, 2021; Schulze, 2000; Vila‐Cabrera et al, 2015).…”