Each Person
Individual
noun
Each self refers to each person or individual.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
遠足には、各自お弁当を持参してください。
You need to bring your own bento box for the school trip.
トーフグのオフィスに入ると、各自が楽な姿勢で横になっていました。
When I entered the Tofugu office, each worker was lying in a comfortable position.
後は各自の判断に任せるしかないよ。
The only thing we can do at this point is let each person decide on their own.