You will need a Japanese font.
multiple ruby texts
Compare to the reference graphic below the test.
Assertion: If there are two ruby texts, the first is placed above and the second below the base text.
Notes:
The Ruby Annotation spec recommends non-normatively that, in the absence of other style information, when there are two ruby texts the first ruby text should appear before (ie. above in this case) the base text, and the second ruby text after (ie. below in this case).