I visited their workshop during my holiday trip recently and placed an order after trying out the sizing.
From my conversation with them, they do not have retail store front at the moment but is working on mail order (not sure when it would be ready though).
They offer MTO options where you can choose the type of leather (calf, suede, cordovan in various colours) and also the sole type (leather, dainite).
As mentioned in some posts earlier on, they make RTW for Clematis Ginza and some of them supposedly be available at Isetan this month.
Below is an example of Clematis Ginza RTW made by them.