Kihitsu started as a sale division or company owned by Koyudo.
Koyudo makes all of Kihitsu brushes and Kihitsu sells those brushes under the Kihitsu brand. (喜筆).
Kihitsu was selling fu-pa and BP series which were the same as Koyudo but not the entire products.
Now Kihitsu is only selling the inventory left.
Therefore, the inventory has old hairs, and the old hairs have better qualities.
For instance, this Saikoho is softer than the current saikoho.
Old Kolinsky is softer than the current one.
Kihitsu BP have old hairs, too. And kihitsu will not sell BP’s after they are sold out.
Please let me know if you are interested )
Thank you for reading!