The decision was taken to act immediately in light of recent information passed to the WRU.
No further details can be provided at this stage as this would prejudice the investigation. If required an independent panel will be appointed to hear the case.
Howley has co-operated fully with our initial discussions and we would ask that the media appreciate this is a difficult and personal matter for Rob and that his privacy is respected before an outcome is reached.
Warren Gatland has consulted with senior players and Stephen Jones will be arriving in Japan imminently to link up with the squad as attack coach.