東海

East China Sea (a sea)

South China Sea (a sea)

Sea of Japan (a sea)

(historical) Donghai Commandery (in present day Shandong province, China)

Donghai (a county of Lianyungang, Jiangsu, China)

Donghai (a town in Chengxiang district, Putian, Fujian, China)

Donghai (a town in Jidong, Jixi, Heilongjiang, China)

Donghai (a town in Qidong, Nantong, Jiangsu, China)

Donghai (a subdistrict of Lufeng, Shanwei, Guangdong, China)

Tōkai (a city in Aichi Prefecture, Japan)

Donghae (a city in South Korea)

Tunghai University (a university in Taiwan)

Tōkai University (a university in Japan)