Yesterday the size of my collection of Japanese pro go games passed 50000.
See
https://homepages.cwi.nl/~aeb/go/games/games/index.html.
Last I compared, there were slightly over 10000 games not in GoGoD.
A large part of the collection is accessible via the web pages, but the archives do contain more.
Apart from the SGF files, there are tournament schemes for many tournaments, useful to
detect problems with metadata (wrong players / wrong tournament / wrong date / wrong result).
No copyright is claimed on games or collection.
Additions and corrections are welcome.