I like Kapital.
I strongly suggest that anyone considering buying the Zipangs to try them on first. The sizing is strange. Very small waist compared to the tagged size and wider legs than you may expect.
I like them too, ring. I didn't find the sizing or the cut of the Zipangs strange, however. Maybe they've changed since you tried them.
Note that the "TH straight" model is exactly the same cut as the Zipang, the only difference being the indigo (and consequently the price..). I was vascillating between one and the other when the shop assistant (Naoki) said 'do you have some time?' When I said yes, he told me they had a 1-year old sample of each in another Kapital shop nearby. We walked over -- they both looked good, but the Zipangs had faded to that characteristic 'aqua blue' that natural indigo so often does (don't ask me why... I know all the arguments which say it shouldn't matter), with much less pronounced whiskering and honeycombing. Some people like it, some people don't. In the end, I chose the TH Straight, not to save money, but because I genuinely preferred the way they faded.
The TH Straight is also in theory available in non-wash (unlike the Zipangs which only come one-wash) but they didn't have any raw ones in stock (Naoki very kindly rang around to check), so I just got a 32 one-wash.
In Tokyo, I found the best place to see and try all the different Kapital jeans is at the "Kapital Legs" shop in Ebisu. It just specialises in trousers (pants to you Americans...), hence the name, and they have worn samples of most of their line.