Japanese coin?

Need help identifying what this coin is. Around 24 mm in diameter. Does it have any value?

Thank you,

Pat

Welcome to Numista!

The characters on your coin's obverse ("常平") indicate it's from Joseon Korea rather than Japan or China. Look here: https://en.numista.com/catalogue/index.php?mode=simplifie&p=1&l=&r=%E5%B8%B8%E5%B9%B3&e=&d=&ca=3&no=&i=&v=&m=&a=&t=&dg=&w=&u=&f=&g=&c=&tb=y&tc=y&tn=y&tp=y&tt=y&te=y&cat=y

You should take better photos of the reverse but I think this is a likely match:
https://en.numista.com/catalogue/pieces35678.html

Also possible that your exact type is not catalogued yet.

It is a variation of the Ho issue as mentioned by CassTaylor.