Interesting trivia bits in this Japanese article, translated thanks to our Japanese CD-i member Gluon VAN, he observed that Yuki Saito Anniversary was pressed 300 copies only, which might give an indication of the rarity of Japanese CD-i titles. The site mentions another version, an interactive music CD-i featuring Miyuki Nakajima, but it was never released. Gluon: " "Yuki Saito Anniversary" CD-i was in development by Atelier Double and showed top sales in Japan for a while, but they only pressed 300 copies. The same developer made "Miyuki Nakajima Record", but it was never released."
From the article, translated from Japanese: "According to the people concerned, "Yuki Saito Anniversary" developed by Atelier Double was the top sales for a while in Japan, but the sales were about 300. Perhaps it was planned to develop the series, it seems that software called "Miyuki Nakajima Record" with a similar naming pattern was also lined up in the title to be released, but it seems that it has been canceled. Now I can say, "There was such a time" (only for Miyuki Nakajima) , but it seems that the market was quite tough."
[Thanks, Gluon VAN, 4gamer.net, picture courtesy of Blazers]