Here's the Google translation from the CDJapan description in Japanese. I bolded the section about whether it had an original Japanese Quad release (since I didn't know and didn't find a listing in discogs.) Looks like maybe Lotus was the most recent and last Quad release back in the 70's, with a Lotus release as late as 1977. Members, please follow me up with any corrections!
So my next question is: why didn't the Quad have a Japanese release?
"The 5th album ``Welcome'' released in November of the same year, which included four songs performed at the first performance in Japan in the summer of 1973, was the first studio work by the New Santana Band, which appeared at the first performance in Japan. . In commemoration of the 50th anniversary of the release of this work, which has shifted to a fantastic and elegant fusion sound, including the use of a female singer for the first time in addition to the vocalist Leon Thomas who came to Japan, this is the world's first SA-CD. The multi-hybrid version is finally here! With the strong impact of the historic live album ``Legend of Lotus'' released the following year, it encapsulates the Santana sound of those days, which is especially familiar to Japanese fans. The original quadraphonic version (4ch mix), which was not released in Japan at the time, was converted to DSD, allowing you to enjoy a high-quality surround mix with a different level of realism from a regular stereo disc. It is also the latest remastered version using SA-CD stereo high-resolution master. The package is a 7-inch paper jacket that is an elaborately resized version of the US version of the Quadraphonic LP, and the overseas announcement poster from that time is also reprinted. A permanent preservation disc coveted by Santana fans around the world! A specially planned disc from Japan."
It's one of the more baffling things about Sony Japan's quadraphonic output, given how popular Santana was there (and globally, really) and Sony Japan having quadraphonic skin in the game as the rights owner for the SQ system.
Abraxas, Santana III, Caravanserai and
Santana & Buddy Miles Live were all issued on quad LP there (no Q8s) as well as a 45rpm single of Black Magic Woman / Everybody's Everything. I think
Abraxas and
III were issued as part of Sony's first wave of SQ discs in late 1971, followed by
Caravanserai and the live album with Buddy Miles in 1972, but no other Santana albums came out in quad in Japan after that except for
Lotus in 1974, which almost doesn't even count given it was a single-inventory release.
The reason I say it's baffling is that even though neither
Welcome nor
Love Devotion Surrender with John McLaughlin (which both came out in 1973) were released in Japan in quad, it wasn't like Sony was out of the quad game by that point. Though they weren't putting out quad albums as often as '71/'72, they continued to issue SQ LPs of Western artists well into early 1974, including Chase's
Pure Music and Kris Kristofferson's
Spooky Lady's Sideshow, amongst others. The only educated guess I can make is that maybe they felt like the market was already saturated with Santana quad product with the four releases they'd already put out, or that the sales for those albums wasn't what they were hoping for.
It's also possible that customer feedback about the quality of SQ decoding (especially in those early days, when it was pretty abysmal) may have influenced the decision - Japan also embraced CD-4 much more readily than other places, and in that transitional era around 1973 a number of labels switched from matrix to CD-4 LP issues (including Polydor and King, who were the licensee for a number of Western labels including Deram, CTI, A&M and others) so maybe Sony saw the writing on the wall and figured they'd rather just focus on selling Santana's stereo product which probably outsold the quad at 20:1 or more.