Recently, I put out a Ryusei collection, see
http://homepages.cwi.nl/~aeb/go/games/games/Ryusei/
or http://homepages.cwi.nl/~aeb/go/games/ryusei.tgz.
It has 2262 games, while go4go claims 1722: macelee, here are 540 additional games, an almost complete collection.

For this and similar collections both playing date and broadcast date are important.
Has anyone already chosen an SGF tag for Broadcast Date? Of course one can put everything in a Game Comment, but that is really for odds and ends, not for standard items that occur thousands of times.

Not really related to your question, but I thought it would be good to share this.

http://ch.nicovideo.jp/RYUSEISEN-igoch

Have to pay for a membership, but a lot of ryusei games to watch.

This is impressive! The complete Ryusei collection has been on my todo list for ages. I still haven't got the opportunity to go through term 8-12, partly because I am busy, partly because I know the source at igo&shogi channel will not go away. It is very useful to have a second reference!

I finally found enough spare time to compile the whole Ryusei collection for Go4Go. Now there are 2312 games in total. I particularly enjoy watching games by those strong players at early career stages.

http://www.go4go.net/go/games/tournament/76

Good! I cannot see your games, otherwise I would do a compare, but your numbers are very similar to mine, I have only a few games there that you don't.

(Maybe you did not distinguish playing date and broadcast date? The dates given are sometimes one, sometimes the other. Has someone already reserved a label for "broadcast date"? Sooner or later I will publish a few hundred classical games, and a similar problem occurs there: one has Japanese date and Western date. I have used JD[] for the former, DT[] for the latter.)

This was a collection of good quality. A collection of medium quality is the NHK one - I have 1596 today, and you list 797, I think. Another 800 free games.