Ichioka
Ichioka (written: 一岡/市岡) is a Japanese surname. Notable people with the surname include:
- Ryuji Ichioka (born 1991), Japanese baseball player
 - Sarah Ichioka, British-American writer
 - Toshiye Ichioka (1912–1995), American actress better known as Toshia Mori
 - Yuji Ichioka (1936–2002), American historian and activist
 
See also
- Ichioka Station (市岡駅, Ichioka-eki), a train station in Niimi, Okayama Prefecture, Japan