Hi, Thankyou for sharing storybirds. This is a great activity that I will implement into my classes as students can use creativity to demonstrate their understanding of topics in a fun and collaborative way.
Erin Website has heaps of clips covering a range of topics that can be good to introduce students to topics. Clips are in Japanese but you can put subtitles (English or Japanese) on so students can develop listening skills. https://www.erin.ne.jp/en/
The Genki textbook has online activities that are free for students. Students can practice grammar, sentence structure, Japanese characters and more. This is a great way for students to study. http://genki.japantimes.co.jp/index_en