If you lose your passport, or it is stolen, or so on, immediately go to the nearest police box (place where there are police officers). Then, contact an embassy, consulate, or other authority of your country in Japan and tell them about what happened.

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transfer of endorsement for passports

If your passport has an endorsement such as for entry or re-entry into Japan, the renewed passport will not have this endorsement. It is possible to have the Immigration Services Agency transfer such endorsements to the new passport (In the case this is not noted on the new passport, it will be necessary to carry both passports until the end of the period of stay).