High-priority alert based on source significance and keyword relevance.
Context
What happened: Japan and the U.S. are reviewing off-duty conduct rules for U.S. troops in Japan after a U.S. Marine in Okinawa was arrested on suspicion of killing a 39-year-old woman at a Naha hotel.
Key numbers: About 54,000 U.S. military personnel are stationed in Japan, mostly in Okinawa.
Why it matters: Crimes by U.S. personnel have long triggered protests in Okinawa, which has urged other regions to share the hosting burden. Motegi said patrols and curfew management would be reviewed with the U.S.