I believe the regulation is within 6 months of getting notified otherwise the application is rejected.
After the NIA has accepted an application and the Ministry of Labor has reviewed it for compliance with foreign specialist professional eligibility as prescribed in paragraph 1 of Article 3, the NIA shall notify the applicant to submit the Passport Submission Notice and his/her passport (original) to an overseas embassy, representative office, or office (hereinafter referred to as “overseas mission”) of the Ministry of Foreign Affairs for verification within six months.