returning to Tokyo (to the capital) — often used as '帰京する' to indicate coming back to Tokyo.
出張が終わり、彼は昨日帰京した。
His business trip ended and he returned to Tokyo yesterday.
代議士は党の会合のためにすぐに帰京した。
The representative immediately returned to Tokyo for the party meeting.
年末は帰省の人が多いが、仕事で帰京する人もいる。
Many people go back to their hometowns at year-end, but some return to Tokyo for work.