It's a very simple design, so that you can add colors or images as you like. Custom header(w/slider), custom background, editor-style are already set.
Of course it can run without any customize if you like simple design.
With Welcart e-Commerce plugin, you can run your own online shop easily. Welcart plugin is one of the best ec free plugins especially for Japanese market. Of course blog posts can coexist on the same domain, on one WordPress.
Breadcrumbs, pagination are already set in the theme. Also, jQuery plugins such as Lightbox (Swipebox), image sliders (Flexslider2) are already adjusted for the theme. With Welcart e-Commerce plugin, jQuery Validation Engine will work on customer's input pages.
Run without WordPress plugins means this theme can run faster, which Google loves. Besides it, this theme will show rich snippets automatically in Google's search results. Because the rich snippets show your contents in detail, it can attract readers to visit your website.