Abstract
Recently, hay fever has been one of the problems widely discussed in the society. While Cryptomeria japonica is regarded as one of the causes of hay fever, it is an important tree species because it glows up fast, and is useful for timber. This report shows to what extent the public suffer from hay fever and what opinions they have about forest and Cryptomeria japonica management. The information for this research was obtained through questionnaires, and answers from one area were compared with those from another area in analysis. The ratio of hay fever patients was less than 20%. It is widely recognized that not only pollen of Cryptomeria japonica but also other factors are concerned with hay fever. In general the public are in favour of Cryptomeria japonica forest because of its important role in forestry, however, the majority of them want the present species replaced by another one with less pollen. It is our task for the future how we incorporate the public opinions in the forest management of Cryptomeria japonica, which is the cause of hay fever and an important species in forestry.
