してもいいalso: してもよいMeanings1expressionmay do; can do; it's okay to doExpresses permission, allowance, or that doing something is acceptable. Often used when giving or asking for permission. The よい variant is more formal.ここで写しゃ真しんを撮とってもいいですか。May I take a picture here?疲つかれたなら、休やすんでもいいよ。If you're tired, you can rest.