The Japanese vigorously enforce laws against drunk driving, speeding and reckless driving. Stiff fines, equivalent to hundreds and sometimes thousands of dollars, and jail sentences are common. If you are involved in an accident, Japanese law requires you to report it to the nearest Japanese police station. Failure to report can lead to imprisonment or a heavy fine. The laws of Japan are very strict regarding possession, use and distribution of marijuana, cocaine, narcotics or any other controlled drug.
Okinawan authorities are hard on narcotics offenders.
The Japanese government treats any involvement as a major offense. Possession of any amount of marijuana can bring up to seven years confinement at hard labor. Possession of LSD can get a person sent to prison for life. Regardless of whether the offense is committed on or off base, the Japanese have the right to prosecute all drug offenders on Okinawa. In Japan, you cannot keep an item that you find.