Direct Personnel is advertising on their website. They specifically say you are responsible for Japanese tax.
They said they have an expedited JCAB course. 8-10 weeks total including type rating. You have to do their type rating whether you already have one or not and pay for it. 22k USD. Their is a signing bonus that covers most of this. But you will also pay tax on the signing bonus. At least this is the info I got from Direct..
Skidmark is paying 14K USD net of Japan tax. ANA is more, but I am not sure of Japanese taxes, and have heard conflicting things from former ANA guys that I know. Dominican???