2) Name -meaning of the place name-

 The original Chinese character is 「美(beautiful)穂(an ear of rice)」 because the shape of a peninsula looked like an ear of rice. Then you can see 3 points of a peninsula, Can't you? That's why this place has started to be called 「三(three)穂(an ear of rice)」. After that people changed the Chinese character from 「穂」 to 「保」.