When he was twenty-one years old, he started to go to the most famous Dutch studies school in Japan at that time.
#When he was twenty-one years old, he started to go to the most famous Dutch studies school in Japan at that time.
#When he was twenty-one years old, he started to go to the most famous Dutch studies school in Japan at that time.
# When he was twenty-one years old, he started to go to the most famous Dutch studies school in Japan at that time.