Recently purchased a sample of this ink from Vanness. Looks like I will be needing more of this Kobe #65 Shinjuku Jet Black.
It's a very well behaved dark black ink with a hint of blue.
Excellent flow, generous without gushing
Some show through
No troubles with ignition
Modest water resistance but I reckon not permanent.
A highly useable, yet, interesting black ink for daily use and joy. Won't let you down and provides a bit of sheen plus a hint of blue for a richer experience.
Can see it compared to Pilot Iroshizuku Take-sumi, which is another black ink with something extra. Paper is Tomoe River. The red ink is Taccia Aka that itself is an amazing ink.