1) How can they include an Ainu-specific segment without a similar one for the Ryukyuan people, Burakumin, etc?
2) Depictions of aboriginal peoples are a no win situation. If the organizers don't include aboriginal culture they are accused of whitewashing the past and when they do they have been accused of cultural appropriation.
It would be great if they could include a segment on the Ainu. But if they don't think they can do it well, then that should be OK too.