You are to blame.
Kimi ga warui n da.
you; buddy; pal; monarch; ruler; sovereign; (one's) master
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
bad; poor; inferior; evil; sinful; unprofitable; unbeneficial; at fault; to blame; in the wrong; sorry
yes; yeah; uh huh; negative verb ending used in informal speech (abbr. of negative verb ending "nu"); abbr. of particle "no"; abbr. of particle "ni" (used especially when it precedes the verb "naru")
be; is; indicates past or completed action; indicates light imperative