The Denso pump part# I originally ordered from Amazon showed China as location of manufacture. I believe most Denso pumps are now manufactured in China.
The Delphi pump says manufactured in Japan. Amazon product ASIN B001QUFAM6
Aftermarket Denso pumps are most likely off shored for manufacture.
OEM fuel pumps (in a Toyota box) for a Land Cruiser will be manufactured in Japan.