(U-0002F89F): Add `sound@ja/on'.

(U-0002F89F): Add `sound@ja/on'.
(U+5FFF): Use `->subsumptive'.
(U+390B): Likewise.
(U-000225D6): New character.
(M-10410): Add `<-denotational' for U-000225D6; unify H6-D741; add
`<-same' for J0-576C.
(C3-2623): Use U-000225D6 instead of U+5FF9 as the value of
`<-denotational'.
(M-10411): Unify U-000225D7 and C3-257E.
(M-10415): Unify U-000225F0.
(M-10417): Unify U-000225ED and H6-D66A; add `sound@ja/on'.
(M-10418): Unify U-000225EF and H6-D6A6; add `sound@ja/on'.
(M-10420): Map to U-000225F4; integrate H6-D746.
(M-10421): Unify U-000225EB and H6-D666.
(RUI6-E028): New character.
(RUI6-E015): New character.
(G-RUI6-E05F): New character.