[ひとりぶたい, hitoributai] (n) performing solo (by oneself); having the stage to oneself; being in sole command; eclipsing (outshining) the others; field of activity in which one is unrivaled (unrivalled)
[どくだんじょう, dokudanjou] (n) (word borne of confusion between the kanji 擅 and 壇) (See 独擅場) field in which one acts unchallenged; unrivaled sphere of activity (unrivalled); one's monopoly