The first one is on http://en.dmm.co.jp/digital/videoa/-/detail/=/cid=anci00004/.
The second one is on http://en.dmm.co.jp/digital/videoa/-/detail/=/cid=anci00007/.
Pretty sure those files are fake. I tried downloading one last week but when I extract the iso (7-zip, I even mount it using Daemon Tools), it asked for a password but the files inside the iso were just .rar files from other JAVs.
Request: YJM-003, there's a link on a website but the file is some 4gb iso. Would appreciate it if someone downloads and rips the video file from it.
EDIT: EpUXEka said it's a fake site so the link is removed.