Japanese & Korean to English interpreter

We are looking for an interpreter that can translate from both Japanese and Korean into English.
The role is to assist with live subtitles from both Korean & Japanese to English (dialogue only, no songs) for the broadcast of a concert of a Korean k-pop artist live from Japan. Assisting the subtitling engineer on when to cue each sentence on the script and also provide some simultaneous translation if the artist says something off script.
Possible translation of the script a few days ahead of the event.
Knowledge of k-pop preferable but not mandatory.