Since installing version 8.5.3 Build 14067 I am no longer able to view Japanese characters I see them as horizontal boxes. I have checked that my preferences are set to UTF8 but this has not made any difference.
It might be something to do with the selected Komodo fonts (or the installed fonts in the OS). If your file is set to UTF-8 (as seen in the Komodo status bar) - then ensure you have the correct Japaense fonts installed on your system, and try tweaking the default font in Komodo’s Fonts and Colors preferences page.