Välkommen till Sveriges ambassad i Kazakstan, Astana
Please refer to the following website. It is to be applied to the Swedish Migration Agency online, not directly to the Embassy in Tokyo.
https://www.migrationsverket.se/English/Private-individuals/Moving-to-someone-in-Sweden.html
So, if you have any question about it, please contact the Migration Agency.
https://www.migrationsverket.se/English/Contact-us.html