In the context of Immigration Control Act, the term “guarantor” means the person who promises Minister of Justice to guarantee a foreign national’s economic conditions and provide lifestyle guidance including compliance with applicable laws if necessary so that the foreign national would be able to stably and continuously fulfill his/her intended purpose for visiting Japan.
Even if a guarantor gives assurance to Minister of Justice with the certificate of fidelity guarantee, Minister of Justice may not legally bind the guarantor to make good on his guarantee. If a guarantor fails to make good on his guarantee, the immigration control authority only instruct the guarantor to meet his commitments. However, as the authority regards him as not fulfilling his responsibilities in this case, the guarantor will lose his eligibility as a guarantor for entry/residence application process in the future. From these viewpoints, the certificate of fidelity guarantee imposes so-called moral responsibility on the guarantor in this manner.
(source: Immigration Services Agency of Japan)