"Nippon" written in Japanese, "JAPAN" and a double "C". This mark is the import mark of Carl Claussen & Co. Berlin-Lankwitz, Germany. The company was in operation from 1920-1974. The mark most probably was used
This mark appears on a porcelain decorated blue on white. Quality of these decorations isn't the best. They seem blurred.
The mark was used in second half of 1950s. Two characters under the rising sun icon mean Nippon (Japan) and vertically written next two characters can be read as Nippon Tokusei (Specially made in Japan).
Modern Kutani mark. The right column means Kutani (Nine Valleys). Still working on the left one.
Unknown year. The mark used mostly on sake cups and bottles. Ozeki Sake was established in 1711 in Imazu and over the years has become one of the major sake brewers in Japan.
Eiraku mark used by a line of Kyoto potters. The lineage of Zengoro Eiraku Japanese potters dates back to 1700's. This specific mark was found on a porcelain ware decorated with red enamel and gold typical for Meiji period (1868-1912).