If you are from a country that does not have a visa exemption agreement, a letter of invitation and some other documents may be required for a visa application.
Please apply for visa support documents from the following link if you need any assistance.
https://www.nissin-trvl.co.jp/tour-form/form.php?id=1450
Please note that participants must meet all of the following criteria to receive a letter of invitation.
・Be registered as an author of an accepted abstract and paper
The time it takes to process a visa application can vary depending on the country of your residence. It's strongly recommended to apply early, well in advance of your travel date.