Shoyeido incense is known for being a traditional Japanese incense manufacturer, who continues to purchase natural ingredients.
From lot to lot, master blenders work very hard to make subtle adjustments to retain the consistent fragrance of a particular incense. They consider the process to be an artistic endeavor rather than mere "production". Human sensitivity is highly-valued in Shoyeido's incense making.
The density of a single stick of incense matters significantly. Fineness or coarseness of ground ingredients affect its burning temperature. Natural incense needs to breathe. If it is too dense, it burns at a lower temperature which changes the scent. On the other hand, if it is too loose, it burns at a higher temperature and the fragrance may be diminished.