- Bohai (Kingdom)--Relations--Ilbon (3)
- Ilbon--Relations--Bohai (Kingdom) (3)
- Ilbon--Relations--Koguryŏ (Kingdom) (3)
- Japan, Sea of--History (3)
- Koguryŏ (Kingdom)--Relations--Ilbon (3)
- 고구려유물 (2)
- Fortification--China--Manchuria--Pictorial works (1)
- Fortification--Korea--Pictorial works (1)
- Historic sites--China--Manchuria--Pictorial works (1)
- Historic sites--Korea--Pictorial works (1)
- Japan, Sea of--Names (1)
- Koguryŏ (Kingdom)--Antiquities--Pictorial works (1)
- Names, Geographical--Japan, Sea of (1)
- Names, Geographical--Political aspects (1)
- Political geography (1)
- Territorial waters (1)
- Territory, National--Japan (1)
- Territory, National--Korea (South) (1)
- Tok Island (Korea)--International status--History (1)
- Toponymy--Political aspects (1)
- アジア(東部)--歴史 (1)
- 朝鮮--歴史--日本統治時代 (1)
- 朝鮮--社会--歴史--高句麗 (1)
- 朝鮮--遺跡・遺物 (1)
- 朝鮮--風俗・習慣--歴史--高句麗 (1)
- 독도 울릉도 (1)
- 발해유적 고고학 (1)