Stampfinder F01

At this point, compare the first character of the basic stamp, not of any overprint. Inscriptions in Chinese characters could possibly be written to read left to right, or right to left. Therefore, both ends of an inscription need to be checked. And, like inscriptions in Roman letters can be very tiny, so can

There are many, many styles or fonts possible, so make the closest match and go from there.

中
This is a stamp of China. Click:

大
This is possibly a stamp of Japan or from a country under Japanese occupation. Click:

日
This is a stamp of Japan. Click:

北
This is a stamp of the Philippines or North Borneo under Japanese occupation'''. Click:

琉
This is a stamp of the Ryukyu Islands. Click:

滿
This is a stamp of Manchukuo. Click:

Other
Click: