Welcome to Tnet. The Sutherland cup and saucer are rather tasteful. That particular mark is difficult to date, except to say it's a post-WWII mark. I don't recognise the pattern (there are hundreds) but nice ones in most patterns can usually be picked up over here in the UK for around $20 (equivalent).
The Japanese pieces are generic export ware from the post-war period when Japan's economy was being rebuilt. No maker mark and of very little value as collector pieces I'm afraid. Only worth what someone would pay for decorative value. There were no imports from Japan to the US between 1941-1945, for obvious reasons, and they didn't resume until the late summer of 1947. From then, the required marking was "Occupied Japan" or "Made in Occupied Japan" until 1949, at which time it was decreed that "Occupied Japan", "Made in Occupied Japan", "Made in Japan" or just "Japan" were all acceptable. That continued until 1952 when occupation ended and the requirement switched back to "Japan" or "Made in Japan".
