The Pilot Iroshizuku Ku-Jaku ink is truly lovely. This colour is subtle requiring close inspection in order to really appreciate what it has to offer. Onlookers may not notice too much of a difference in your ink colour if they don't pay attention, but when you look at the Ku-Jaku ink closely you really start to appreciate the tone and shading that it has to offer.
For me Pilot Iroshizuku inks are great quality. The packaging has a premium feel with its simple and classic design. The colour of the ink is included on the box with a stripe down the centre. The wide, slim shape of the bottle shows off the ink colour and the thick glass bottom gives the bottle some weight. Before you even get to use the ink you get a sense of quality and pride from Pilot in what they do.
I had been repeatedly looking at the Ku-Jaku colour online for months. I was interested in adding a green ink to my humble collection, but wanted something fairly dark with a bit of depth. I have pretty bad eye sight and sometimes a light toned ink colour leads to me strain my eyes so I tend to stay away from them. The Ku-Jaku is almost a mid way point between a green and blue ink and it is utterly lovely. The English translation of Ku-Jaku is Peacock which is the perfect image that this colour ink brings to mind.
My written review below shows the great shading you get from the Ku-Jaku. The darkest shades are almost a rich teal colour and the lighter tones a great blue/green. At the moment I am not sure I have got the most from this colour as I have not used this in a broad nib pen, my review below was written with a Pilot Metropolitan with a fine nib. This is my second colour from the Iroshizuku range and I have found that the ink flows well no matter what brand fountain pen I am using. Dry times vary depending on the paper stock but on the whole the ink dries fairly quickly.
I am really pleased that I decided to add the Ku-Jaku to my collection, it has fast become one of my favourite ink colours. It works really well for a winter ink tone and looks great in my notebooks. I would highly recommend it. You can pick up a 50ml bottle from most online retailers which should last you for a long time.