Report a lost or stolen passport – GOV.UK https://www.gov.uk/report-a-lost-or-stolen-passport/y/lost/adult/abroad/japan
EF 663 708 755 JP https://trackings.post.japanpost.jp/services/srv/search/?requestNo1=EF663708755JP&requestNo2=&requestNo3=&requestNo4=&requestNo5=&requestNo6=&requestNo7=&requestNo8=&requestNo9=&requestNo10=&search.x=62&search.y=24&search=Tracking+start&locale=en&startingUrlPatten=
Individual Search by Item Number – Japan Post https://trackings.post.japanpost.jp/services/srv/search/input?locale=en