Sweden goes to the polls on 11 September. As a Swede with voting rights abroad, you can vote in the parliamentary elections - but you need to consider the following.
You must be 18 years old no later than on election day,
You are a Swedish citizen
You are now, or have been, registered in the population register.
Postal votes shall be sent from abroad. Postal votes may be arranged no earlier than 45 days prior to election day. Postal votes must have arrived by the time votes are counted.
You can vote early at embassies and consulates, you cannot vote on election day from abroad. Date,time ans city in Japan will be listed shortly at this page.