The headquarters are in Tokyo.
On Monday, I visited Tofugu HQ.
It’s so quiet in the head office today, I can hear myself not working.
The origin company is where everything in your company comes from. This is your main base. This is your headquarters.
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.