Japanese

交番 (kōban): a small community police office.

Noun

交番 ‎(hiragana こうばん, romaji kōban)

1. a small community police office or police box
2. alternation, alternating (e.g. current)

References

1. ↑ 1998, NHK日本語発音アクセント辞典 (NHK Japanese Pronunciation Accent Dictionary) (in Japanese), Tōkyō: NHK, ISBN 978-4-14-011112-3