Japan is 70% wooded. 40% of this area is covered with pine and cypress trees planted during WWII, when demand for domestic timber was booming.
Because Japan now imports most of its timber from other countries, these artificial forests are now rotting. The trees were planted too close together and they need to be thinned.
The care of these forests is actually a part of Japan's Kyoto Protocol targets.
So China has too few trees and Japan has too many.
Easy. Make disposable chopsticks out of thinned wood from Japanese forests.
But Japanese chopsticks cost 7 times as much as imported ones.
So, it's up to you, shoppers. Put your hand up. Pay for the timber.