Kihitsu goat and kolinsky brushes
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 are the same as Koyudo but not the entire products.
Now Kihitsu stopped selling them, and keeps selling only the inventory left.
Therefore, those are old hairs, and old hairs have better qualities.
For instance, this Saikoho is softer than the current saikoho.
Old Kolinsky is softer than the current one.
Thank you for reading!