Yup! I can always tell by the flower seal as well as the writing. Japanese writing has much sharper lines than say Korean etc.
The flower is called a mum and is also found on Japanese Arisaka rifles. Definitely a cool historical symbol. It also has the Chinese characters for Japan aka 日本 printed on it。Korean now uses its own letter system. Back in the day their notes were also printed in Chinese characters and look very similar to your note. 朝鮮 (Chosen or Josun) is what is printed on older Korean currency. It is a dynasty in Korean history.
Probably a more lengthy explanation than you wanted but I am new and don't get to help as much as other have helped me as far as paper money goes but I do speak Korean and a fairon amount of Chinese so I can help on that side of things.
The note with the dragons is Japanese Military Yen issued for use in occupied China during WWII. The other note is an immediate post WWII era note.
My guess is 1940 10 yen note for the one with dragons. As far as value goes I am not really sure but alot of similar East Asian notes go for $5 or $10. You never know though some can be worth a good bit. How did you pick it up?
