These are gorgeous inks!
I have three - syo-ro, tsuki-yo, and shin-ryoku - and they are stunning sophisticated colors, imo, and not chalky at all. And I'm thrilled to see they are water-resistant, too.
Thanks for the review. I find myself reaching for the pens with these inks often just because they are so beautiful to see laying down a line of color on a bright white paper (in my case, Clairefontaine).
At first I thought myself overly indulgent (in paying the shipping from Japan), but for a color junkie like me, they are totally worth it. Uh, did I mention I like these inks?