Japanese crossword puzzle

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Across
  1. 2. northernmost island
  2. 6. Least populous
  3. 8. a loop of volcanoes
  4. 10. an archipelago off of china
  5. 11. started taking over
  6. 15. makes it hard to farm on
  7. 16. country symbol
Down
  1. 1. no contact outside of a country
  2. 3. a chain of islands
  3. 4. capital of japan
  4. 5. third largest island of japan
  5. 7. largest island
  6. 9. there for show
  7. 12. the actual ruler of japan
  8. 13. tallest mountain in japan
  9. 14. number 1 resource