In 1994, a mail order set was sold in Japan.  Every few months a new CD would arrive to be added to the set, ending in 1995.  Titles "Sweet Memory", the set had cool artwork, sort of Southern California inspired.  It was a limited set and can be difficult to find and can be pricey if you do.

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Each disc had a loose theme and the songs on that particular disc somewhat matched the theme.

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In 2017, the set was released in Japan, this time as a box set and new, more simple artwork was included.

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If you count their studio releases (minus Christmas) this 6-disc set includes 75% of their catalog.