Japan puzzle thingy i donnu

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Across
  1. 2. the name for the highest mountain in japan
  2. 3. when it comes to ______ the japanese are very advanced
  3. 5. this is the continent that japan is in
  4. 6. the name for the swords that samurai used
  5. 8. a long time ago japan was actually an ______
  6. 9. this is the country that japan is closest to
Down
  1. 1. the japanese city that was nuked
  2. 4. The most common language in japan
  3. 7. in ww2 japan was nuked by the ___