Zhangjiakou (a prefecture-level city in Hebei, China)

the Baijiaxing (Hundred Family Surnames), a classic Chinese text composed of surnames

Kyūjitai form of 縦横家 (“School of Diplomacy”)

the most noble three branches of the Tokugawa clan (徳(とく)川(がわ)氏(し) (Tokugawa-shi)): 尾張(おわり) (Owari), 紀伊(きい) (Kī), and 水戸(みと) (Mito) / (figuratively) the "big three"

a female given name

author of hentai (pornographic manga)

Kyūjitai form of 留学生: international student, student studying abroad, (foreign) exchange student

Kyūjitai form of 大学校 (“college, university”)

Kyūjitai form of 量子力学

Kyūjitai form of 代数学 (“algebra”)