I received three of the four new Iroshizuku ink colors this past week. The only one that I did not get is ina-ho which is a brown.
I'm a little ambivalent about these inks, they are not quite as intense and saturated as some of the other Iroshizuku inks, but I do like them.
I did not think that I was going to like the kosumosu, which is a light pink, but the more I use it the more I like it. The green is truly a bamboo color and also a nice writer, but my favorite of this group is the mirasaki-shikibu, which is a luscious purple. They call it a bluish purple but I do not detect the blue.
These inks are currently available in the US from Jetpens or on eBay from Engeika, I'm sure Goulet Pens will have these inks soon also.