I wandered into Kamakura, I happen to like the shirts! sadly was pressed for time and didn't try any on, but I may.
As a conclusion(or maybe a more heated discussion) for this thread, I actually went to our very own David Reeves. prices were reasonable, and the process is bespoke. we will see how fittings and the test shirt come out. it will be a telling tale, for me at least, about the product his system can produce. very excited all in all!