NHK VooK
From the Audiovisual Identity Database, the motion graphics museum
Background
NHK VooK (nicknamed "The Original Visual Book" in Japan) is an educational video distributor owned by NHK Corporation. They were known for many releases of educational content by the NHK.
(1980s-1993)
Logo: TBA.
FX/SFX: It's all animated beautifully in decent and choppy CGI. The NHK logo rippling away, TBA for the rest.
Music/Sounds: A tone changing synthesized piano arpeggio followed by a descending whistle and a cartoony synth clank. The theme ends with a repeating synth theme that ends happily.
Availability: Uncommon in Japan. Can be seen on educational video releases from NHK Corporation. It makes a surprise appearance on Nadia: The Secret of Blue Water (both the original release and the English ADV Films dub).