DenkosekkaYoasobi J-POP SUPERSTARS YOASOBI UNVEIL NEW SONG “HEART BEAT” THEME FOR ANNUAL JAPANESE TELEVISION PROGRAM HIT SINGLE “IDOL” NAMED #1 SONG OF THE YEAR ON BILLBOARD JAPAN HOT 100 9 months ago J-Pop superstar duo YOASOBI unveil a new song “HEART BEAT;” listen/share HERE. The song will act as the theme…