This might be obvious, but do you use waterproof mascara? That's the only way I can get my lashes to stay curled for any length of time. My go-tos are Maybelline Lash Stiletto, Loreal Voluminous Millions, and Maybelline Falsies. (Also Japanese mascaras are great options if you don't mind buying online)

Hey Roundcat (and anyone else who comes), I'm just going to stick to English for now. I'm lielongerly, I'm still pretty early in my Japanese learning (first Genki textbook, though a bit more supplemental vocabulary). I've been studying less than a year. Hopefully this will be a great community for us all to help each other on our journey in learning Japanese!