瑞西 is read as すいす (suisu) and means Switzerland.
すいす
suisu
みずみずしい
fresh and youthful
ずいほうしょう
Orders of the Sacred Treasure
たいせい
the Occident
せいせい
western expedition
とうざい
east and west
なんせい
southwest
かんぜい
Kansai
にし
west
ほくせい
northwest
ほくほくせい
north-northwest
せいほくせい
west-northwest
せいなんせい
west-southwest