noun
chief superintendent (police)
A senior rank in Japanese police organizations, above superintendent and below senior superintendent.
彼は警視長に昇進した。
He was promoted to chief superintendent.
警視正 is a lower rank (superintendent), while 警視長 is chief superintendent.
Compound of 警視 (police inspector) and 長 (chief). The exact historical derivation is uncertain, but the spelling is conventionally associated with this police rank.