However, its effectiveness is unclear as maintenance of the seedling supply system is ongoing (the plan is to increase the supply of low-pollen Japanese cedar seedlings to approximately 11 million by the year 2017) and forest owners find it difficult to consider felling or transplantation due to the low price of cedar wood.
ただし、苗木供給体制の整備が進行中（少花粉スギの苗木供給を平成29年までに約1,100万本へ増強する計画）であること、森林所有者がスギ材価の低迷で伐採・植え替えに応じにくい環境にあることから、実行性はなお不透明である。