Hi, I'm from South Korea, and I am not good at English, so please forgive me for using Google Translate. I can speak Korean. So, I refer to North Korean materials and edit them. North Korea does not directly announce the change of their administrative district. That's why a lot of the information on sites like GeoNames is outdated. It appears to be a pre-1945 place name(https://namu.wiki/jump/uwp5CGjOS6g8YRtuJco1dJYkrtLfKBolnB7XXwlLPXVgyLfh4N7S8DUj8TgLjET6). The most recent administrative district in this place was known around 2013, and this place name could be confirmed on the North Korean map of '와우도수출가공구(Waudo Export Processing Zone)'(https://www.joongang.co.kr/article/17382427#home).
This is also consistent with the data from 2008(http://www.cybernk.net/infoText/InfoAdminstList.aspx?ac=A0228&mc=AD0101&direct=1).
Have a nice day!

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