OVERLAP RECORD stem is OVLC. TMS MUSIC stem is TMS.
It seems TMS is the publisher, OVERLAP RECORD is the distributor. As you can see here:
Quote:
発売元:トムスミュージック 販売元:OVERLAP RECORD
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http://www.seikodo.co.jp/entertainme...em/000188.html
Edit: I put them both on the Tokyo Movie Record label for now. It isn't clear whether TMS has switched to the new name.