JTB, a travel agency, is able to provide you support and advice to reserve your accommodation during AQIS18. It is possible to get in touch with them by filling in a form on the registration webpage.
If you prefer to reserve your accommodation independently, you should be aware that, unfortunately, there are no hotels at walking distance from the conference venue. However, transportation is fast and efficient, so you can safely book any hotel in the central areas of Sakae or Nagoya Station. By clicking on the image below, you will be brought to Google Maps, ready for you to choose your hotel. In order to check the distance, after choosing one hotel on the map, you can ask Google Maps to give you the directions from the red pinpoint highlighted below.