Bahasa Jepangnya “tertawa riang”

berguling-guling; berbunyi nyaring; sering berubah; beruntun

(rolling) along; with a bright, ringing sound (e.g. of a bell); (changing) frequently (of opinions, conversation topic, etc.); (losing) all too easily

riuh ramai; berkilau; bercakap dan tertawa riang; beriak

to be boisterously noisy; to shimmer; to do merrily (laughing, chattering, etc.); to ripple