Jamie Joseph has agreed to coach Japan from next year and Mark Hammett will take charge of the Sunwolves in the next Super rugby series.
Rugby sources in Japan say the deals are definite with Hammett's appointment expected to be ratified later tomorrow while Joseph's choice may be officially revealed later in the week.
Joseph played as a lock-looseforward for the All Blacks at the 1995 RWC and Japan at the 1999 tournament before starting his coaching career with Wellington, the Maori All Blacks then the Highlanders from 2011.
He led the side to their first Super rugby title last year and is contracted until the end of the 2016 campaign.
Several Japanese rugby officials visited Joseph last week to negotiate details about him succeeding Eddie Jones as the country's international coach through to the 2019 RWC in Japan.