Japan’s Defense Minister Itsunori Onodera is scheduled to make a trip to Hawaii in January and he’ll be visiting the Aegis Ashore test facility there.
By Commander, U.S. Naval Forces Europe-Africa/U.S. 6th Fleet (Aegis Ashore Missile Defense Complex Romania) [Public domain], via Wikimedia Commons
Tokyo is keen to induct the system and the government is expected to include funds to procure the system in the next budget.