Conversation so far:
When was Miyamoto Musashi's first duel?
According to the introduction of The Book of Five Rings, Musashi states that his first successful duel was at the age of 13
When was Miyamoto Musashi born?
c. 1584
What happened after Miyamoto Musashi moved to live with his uncle?
when Musashi was seven years old, the boy was raised by his uncle, Dorinbo (or Dorin), in Shoreian temple
Where did Miyamoto Musashi go to school?
Both Dorin and Tasumi, Musashi's uncle by marriage, educated him in Buddhism and basic skills such as writing and reading.

Question: Did he have a formal education?
Self-contained rewrite: Did Miyamoto Musashi have a formal education?