Just looked at the submission form for the upcoming conference and the dates for the days you can present are from last year's conference.
告知フォーラム
Submission form for 2019 conference
アクセシビリティ
Images
Links
Alignment
Guide
Motion
Read
Saturation
Focus ring
Cursor
Colours
Custom colours
Sample text with a link
Font
Text size
%
Quick picks
The quick brown fox jumps over the lazy dog.
Spacing
Letter spacing
em
Line height
Word spacing
em
Line width
characters