The flag for Svalbard & Jan Mayen, which may show as the letters SJ on some platforms. This is the same flag as Norway.
The Svalbard & Jan Mayen emoji is a sequence of the 🇸 Regional Indicator Symbol Letter S and 🇯 Regional Indicator Symbol Letter J emojis. These display as a single emoji on supported platforms.
Svalbard & Jan Mayen was added to Emoji 1.0 in 2015.