index.js

'use strict';

var fs = require('fs');
var program = require('commander');
var GoogleMapsAPI = require('googlemaps');

var gapiConf = {
  key: 'google API key',
  secure: true
};
var gmAPI = new GoogleMapsAPI(gapiConf);

var geocodeParams = {
  language: 'ja',
  region: 'ja'
};

var data = JSON.parse(fs.readFileSync('data.json'));
var outputFile = 'data.json.out';

for(var i = 0; i < data.length; i++) {
  (function(i) {
    var address = data[i].address;

    geocodeParams.address = address;
    gmAPI.geocode(geocodeParams, function(err, result){
      if(err) {
        console.error('[' + i + ']', 'Parse failed: ', address);
        console.log(err);
      } else {
        var location = result.results[0].geometry.location;
        console.log('[' + i + ']',location);
      }
    });
  })(i);
}