The Transport Ministry said members of the team working on the investigation would leave Tokyo on Sunday for Everett. It provided no further details.
The U.S. Federal Aviation Administration and Boeing earlier dispatched investigators to join the probe in Japan.
All 50 Boeing 787s in use were grounded after a lithium-ion battery in a 787 flight by All Nippon Airways on Jan. 16 overheated, forcing an emergency landing. Earlier in January, a 787 operated by ANA's rival Japan Airlines suffered a battery fire while parked at a Boston airport.
Investigators on both sides are trying to determine why the batteries have overheated and how to fix the problem.
MORE HBJ HEADLINES
Fortune 500 company will bring prestige, boost to local philanthropy New Jeep Renegade: Small stature, big character Union Gap company gets the ‘Colbert bump’ Macy’s selling top 4 floors of downtown Seattle building United dangles jet order to spur pilot pact Canadian employment climbs in September on part-time gains
Our new comment system is not supported in IE 7. Please upgrade your browser here.