Table:
text: List of islands by population density
Most densely populated islands (over 1,000 people per km²)
Most densely populated islands (over 1,000 people per km²)
Island Country Population Area_km² Density_per_km²
Île Jésus ( Laval ) Canada 400,000 (2010) 245 1384
Smögen Sweden 1,437 (2005) 1.04 1381
Öckerö Sweden 3,269 (2005) 2.39 1368
Mercer Island United States 22,699 (2010) 34.0 1333
Île de la Cité (Paris) France 1,168 (2007) 0.9 1297
Labuan Malaysia 100,000 (2010) 85 1177
Capri Italy 12,200 (2002) 10.4 1170
Okinawa Island Japan 1,384,762 (2009) 1207.87 1146
Penghu Island Taiwan 70,200 (2010) 64 1100
Java Indonesia 130,000,000 (2006) 132187 1026

Question: From the list of islands by population density, what is Japan's area in km²?

Question: Which island in the list of islands by population density has a density per km² of 1,368?