Translation guide
A spaceport is a facility for launching and receiving spacecraft. In Japanese, the most common term is 宇宙港 (uchūkō), a direct translation. Other terms exist but are less common or more technical.
A new spaceport is planned to be built in Hokkaido.
A commercial spacecraft was launched from that spaceport.
A loanword from English, used in some contexts, especially in science fiction or when referring to specific named facilities. Less common than 宇宙港.
That sci-fi movie features a giant spaceport.
Specifically a facility for launching rockets or spacecraft, emphasizing the launch aspect.
Literally 'launch site'. Used in technical or aerospace contexts, often as part of compound names like 種子島宇宙センター射場 (Tanegashima Space Center Launch Site). Not a general term for spaceport.
The rocket was launched from the launch site.
Means 'launch facility'. More descriptive and less common than 射場. Used in official documents or technical descriptions.
A new launch facility is under construction in this area.