Displaying Japanese and English Text on the Web

If Japanese isn’t specified as the document’s language, and if you haven’t applied specific styling for a block of Japanese text, Chrome will interpret Japanese kanji (characters borrowed from Chinese) as Chinese-language text, which is by default rendered in a serif font. Instead, if you assign a specific font in CSS, the browser will try to be smart and choose a matching default serif, sans-serif, or monospace font to render the Japanese characters. will give us a monospace Japanese font, while may give us serif, sans-serif, or monospace, depending on the browser and platform.

Source: www.nobadmemories.com