Photo of the pot itself.

It sounds like lustreware, also called lusterware, sometimes one word, sometimes two (lustre ware, luster ware). My uncle was stationed in Japan after WWII, & he gave some of those to his relatives; they had to say "Made in Japan" by law or rule or something. On some of my relatives' sets, when you look into the bottom of the cup, you see an embossed image of a Geisha girl. Look on ebay for active & completed sales, & when you're in "advanced" search, exclude words like German, new, reproduction, maybe Czech. Best luck!

Well the terms Made In was not generally used until after 1919....and there was almost no US presence in Japan during WW I which ended in 1918. And that blue and peach lustre with cherry blossoms was a very popular pattern in the 1950's era...google it there are a few just like yours and many variations on the theme.

The set with the blue handles and "made in Japan" on the bottom is most likely from the mid 40's through the 50's. Made in Japan became in common use, substituting for just Japan" on wares that were un marked with a maker's name beginning in 1941. The second set is the Moss Rose pattern....made by many potteries, including CF Haviland, J G Meakin and others. It has a maker's mark but I can't read it. Because it says simply Japan I am guessing it is early 20th century....and if it's a child's set and complete as it appears to be, it's very desirable!! Lots of people love Moss Rose....guessing it might bring $200 at the right auction.