Casual — to friend
Cultural · Seasonal
今年の花火大会、一緒に行かない？浴衣で行くと楽しいよ！ — Want to go to the fireworks festival together this year? It's so fun to go in yukata! (Cultural · Seasonal, Casual — to friend, JLPT N4)
You
今年の花火大会、一緒に行かない？浴衣で行くと楽しいよ！
ことしのはなびたいかい、いっしょにいかない？ゆかたでいくとたのしいよ！
Want to go to the fireworks festival together this year? It's so fun to go in yukata!
Romaji: Kotoshi no hanabi taikai, issho ni ikanai? Yukata de iku to tanoshii yo! / Reply Romaji: Ii ne! Yukata, kite ikouyo.
Reply
いいね！浴衣、着ていこうよ。
いいね！ゆかた、きていこうよ。
Great idea! Let's wear yukata and go!
Gesture & etiquette
Casual enthusiasm is perfectly appropriate here — smile and use rising intonation on 「行かない？」. This is a social invitation between friends, so warmth and excitement are welcome and expected.
Summer fireworks festivals (花火大会) are among Japan's most beloved seasonal events. Wearing a yukata (summer kimono) is a cultural tradition especially among young people. Key etiquette: arrive early for a good spot, bring a mat and insect repellent, and expect massive crowds near train stations after the show.