[OFFER] Windows 2000 Professional Service Pack 4 [Japanese]
This isn't my upload, but I have successfully installed w2ksp4_ja.exe from it on a fresh installation of Japanese Windows 2000 Pro. You can find the file's MD5 checksum ba2cf3e4e7fb644871b3263392e9080a on several Japanese websites.
https://archive.org/download/Windows2000ProfessionalJapanese
Comments
There is Windows 2000 with sp4 there you can download on the site old-dos.ru
http://old-dos.ru/dl.php?id=19990