The head of Division 1: Shannen Song

 

Shannen Song (or Song Jieun) - She is the head of Division 1, also JYPE Japan director. 

2 people left Division 1 and JYPE
3 people left Division 2 and JYPE
1 person left Studio J and JYPE
All Staff in Division 4 are new employees
GOT7’s manager 강민성 is still under DIV2
송지은 Shannen Song is still heading DIV1
문호윤 Moonworker is still heading Studio J

2/3

— JYP GROUPS (@jypewhy) June 29, 2020

She is a long term fan of 2pm and she used to post many cute posts about 2pm on her Instagram until fans kind of exploded it.

Her interview about Twice in Japan which also gives some insights about JYPE operation in general

Side note: The current number of employees of JYP right now

JYPE STAFF PER DIVISION UPDATE; (MAY 2021)

Division 1: 37 (shared by 2PM, SKZ and NiziU)
Division 2: 27 (for ITZY)
Division 3: 32 (shared by TWICE & JY. Park)
Divison 4: A&R
STUDIO J: 21 (for Day6)

Company Employee Total; 203 (Korea Exchange (KRX) Update) https://t.co/hzP8iulRqs pic.twitter.com/qVlR7EqX0Q

— JYP GROUPS (@jypewhy) May 2, 2021