It is said that this is not an early season cultivar that disperses pollen from around the age of 30 years but a late season cultivar that disperses pollen from around age 50 years and, if this is true, then there is a concern that pollen from not only Japanese cypress trees but also from Japanese cedar trees will increase in the west of the Kanto region.
それは樹齢30年ごろから多く花粉を飛ばす早生品種ではなく、樹齢50年ごろから多く花粉を飛ばす晩生品種といわれており、それが真実であれば関東以西ではヒノキのみならずスギ花粉もさらに増加する心配がある。