Trump is sending in troop from Japan. It is only a matter of time before the invasion of Iran starts after how can Trump select the next leader of Iran if he does not have a seat at the table? This will be the longest and bloodiest war of the Middle East. Trump will come up with a reason for the war at a later date.
@Zardoz,
No.
Japan has not ruled out sending warships to the Gulf but said that the threshold for doing so would be very high.