What American band sold more records in Japan than any other? If you said the Ventures, you'd be right. In fact, they even outsold the Beatles. Of course, they've released over 150 albums since 1958. Still, there is something enduring about the surf rock sound that they helped to create.
Nearly all of the Ventures' music is instrumental. Perhaps this partly explains their popularity in the Far East. By the early 70's, though, the Ventures were mixing it up a bit. 1971's New Testament finds the band getting a bit "psych" in their sound and they also incorporated some vocals. Check out Good Morning Captain. This is solid stuff.
https://www.youtube.com/watch?v=_rGmgZWOpUs