The Certificate of Eligibility is effective for three months. In this sense, if you fail to apply for landing Japan within three months after receiving the certificate, the certificate will naturally expire.
Please note that it should be noted that the effective period of the Certificate of Eligibility is different from that of your visa.
(source: Immigration Services Agency of Japan)
For inquiry to Visa and Beyond by Takatsuka Office, please send a message through a contact page.
Visa and Beyond Immigration Services 