As these jobs are attracting attention from those new to the contract world in general and Japan in particular I'd like to make a suggestion.
It's probably a very opportune moment for veterans of contract work in Japan to pass on genuine examples of how long it takes to get on line within companies there. This may well be vitally important to you if your 'advertised' salary is based on actually being a productive line pilot. This has been a major stumbling block discussed on-line for the last 10 years that I know of.
Regards
Rob