Holy Freaking Crapola Farging Amazing haul their Bill. You are THE MAN. I am really proud that you are a QQ member and are posting all of these great finds here in the forum. Yikes!
Looks like the entire RCA/Victor Japanese quadraphonic roster. When you consider over the past 20 years I've probably seen THREE Japanese Q8's on eBay total, maybe less, to find that many is unreal (I know you didn't get them from eBay, but you would have thought that Japanese sellers would have sold SOME of those titles on eBay over the years, the QLP's show up quite regularly.)
Better up your insurance coverage on your house!
I have the feeling that Q8 for local japanese market were done in low number, as for stereo 8 track tapes - check out how few japanese Beatles 8 track you can find on ebay or yahoo auction - while LP were not only seen as a better media and easier to market, but also cheaper; from the obi or other prints LP were in the 2100-2500 yen, q8 on the 2800-3000.