@MrsWattle
Yep correct it can be done within 24 hours. Actually if all paperwork is done it can be done in an hour! (scroll to FAQ) on link
Getting Married in Japan as a Foreigner - japanistry.com
The interesting thing is you are not provided with a certificate of marriage.. if you want one you can go back to the municipal office that married you at a later date and providing you gave proof of who you are you can obtain a copy! Boom…
Searching records for western marriages is a tad complex. When both parties are non residents. Japans marriage registry is the Koseki Family Registry -
Kosek Family Registry
Koseki family registry is an official document that registers every Japanese citizen, and it plays a role of all birth, death, marriage and divorce certificates. Please note it doesn’t register non-Japanese citizens.
In order to obtain the record, you must provide following information to the city hall where the Koseki record is registered to:
- Honseki (Permanent domicile)
- Head of family in Japanese writing.