After wracking my brain for a USA culture activity for the month of May, I remembered May (and June) is the main month for prom! So why not try to bring prom season to Japan? Students can make moodboards/collages of what they would wear to prom, what the theme of their school's prom would be, and as an option, even a poster for what friend/date they would take. As a bonus, they can even write out their own promposal!
There's no English requirement here, just make pretty Google slides and answer the questions on the worksheet with 1-2 sentences. This activity is for my English Culture class, but if you're looking for some fun Friday afternoon easy culture activity, that fulfilled my purpose pretty well.
The PowerPoint contains 3 example collages, a video of promposals, prom theme examples, and for your own personal touch, I suggest including pictures of your own prom :)
My students took 2 full classes to really perfect their slides, so you could definitely assign this as homework too. When they were done, they sent me screenshots of their work, and I compiled them into a voting game, where they had to guess which classmate made which collage.