One of the creators here -- gathering the Danbooru data in one place was definitely a big help! Anime's been a pretty nice space (both personally and research-wise) especially due to the abundance of data online, and it's great that we no longer have to manually scrape image hosts (which I've spent many hours doing in the past @ https://github.com/kvfrans/deepcolor, https://canvasdrawer.autodeskresearch.com/ etc).