Hey Chao,
Ikebana has not been explicitly tested with the infinite scroll so far, but the theme’s portfolio masonry layout is based on Isotope, which can be combined with Paul Irish’s Infinite Scroll plugin. Thus with some customizations and changes to the theme’s code it should be possible to use the infinite scroll function; for the sake of clarity, please note that such changes are not covered by the theme’s support guarantee on ThemeForest because they are classified as theme customization. To implement the infinite scroll, you will need to integrate the plugin itself, as well as most probably edit the theme’s “header-functions.php” and “page_portfolio.php” template files.
Should you have more questions, do not hesitate to ask!
Sincerely,
Andrew / Satori Studio