noun, noun or participle which takes 'suru'
entering the capital; entering Tokyo
Refers to arriving in or entering the capital city. Historically used for Kyoto, but in modern contexts it usually means entering Tokyo. Often used in news or formal contexts.
See also: 退京
新幹線で入京する予定です。
I plan to enter Tokyo by Shinkansen.
入京
After arriving in the capital, I headed straight to the meeting.