Hiroi Michiaki: Umm. This is–
Mrs. Hiroi: This is, oh, a whistle.
Hiroi: No this is different, it’s a howling top of a bush warbler on a plum blossom.
Mrs. Hiroi: So the bush warbler spins.
Hiroi: It’s a howling top.
Mrs. Hiroi: Eh? It’s not a whistle top?
Hiroi: No, no. This is, umm… ah, I know. Yeah. You wrap the string here, and if you hold this bush warbler and pull it, this is a top that makes a pooouu noise. It’s in the shape of a plum blossom, a bush warbler on a plum blossom.
Mrs. Hiroi: Yeah, the bottom is a plum blossom. Plum.
For Japanese, see this page.
For video, see this page.