Hi, MG, and many thanks for the welcome!
I don't know this version - the one I've got is by Benny Goodman, with a chart by (I think) Mary Lou Williams... if not her, then someone else who was writing in a "post-swing" style for sure. (A lot of her arrangements are on the recording - Undercurrent Blues, i think, on Blue Note? Most of my jazz collection is in storage right now, so I can't check.) Not sure offhand who did the vocals, either - argh! (My aging memory... )
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Re. Ugetsu, I think it could be a reference to this movie (which I haven't seen for a long time) -
(Criterion DVD release here...)
Cheers!
[Edited to add correction.]