According to Li'l Kenny Rosenthal, but Dylan Hernandez and others are very much disputing that translation of the Rakuten's president's comments (which were the basis of Rosenthal's report). Basically, where it looks like we're at is that Rakuten will try to convince Tanaka to stay long-term, and if he can't be convinced of that, they're going to decide whether they have a fiduciary responsible to post him now vs. trying to post him next season vs. keeping him for two seasons and risking free agency.
SUNDAY, 5:43pm: The posting system document has yet to be finalized, tweets Joel Sherman of the New York Post. Sherman adds, even when approved by NPB, the agreement still needs to be ratified by MLB's Executive Council, which could come this week. In a second tweet, Sherman reports the main points of the new posting deal have been settled with smaller items slowing things down.
SUNDAY, 3:15pm: Japanese teams will be able to set a desired amount for the posting fee up to a maximum of $20MM, reports Mainichi. Once the Japanese team sets the posting fee, it will be made public to all 30 MLB clubs and all teams who tender that figure will be able to negotiate with the player. The Mainichi report adds the new posting system is expected to go into effect as early as next week and will pave the way for Tanaka to be posted.