Japanese carved coffee table and end tables

I was told these are from around 1930/1940 due to the  nails holding the table together and the way it is put together 

There is 1 coffee table and 2 matching side tables. They have a craved design on top under glass top and craved design on sides along with a craving on the legs.

There are some older cracks on the legs but nothing is borken. I was told they just need a small repair for the cracks and to be cleaned up. The glass on the table we believe is newer replacement pcs. There is 1 coffee table that is 23.5 inches  wide by 52 inches length and 17 inches hight and 2 side tables that are 15.5 inches wide and 28 inches length also 17 inches high.   There is a japanese writing on the side table.  The image is the same on side tables and the larger table is just a explanded view of the same design.