Parse Japanese address into an object

parse-jp-address.js

// Use at your own risk. Will not work for all Japanese addresses.

const regex = /^(.+[都道府県])?(.+?[市郡区町村]+)([^0-9０-９ー－　-]*)([0-9０-９]+[丁目番地のー－-]*(?:[0-9０-９]+[番ー－-]?(?:[0-9０-９]+号?)?)?)?[\s　ー－~-]*(.*)?/

const getMatch = (matches, index) => (matches ? matches[index] : null) || ''

const parseJpAddress = (str) => {
  if (!str || !str.length) return {}

  const matches = `${str}`.trim().match(regex)
  const prefecture = getMatch(matches, 1)
  const municipality = getMatch(matches, 2)
  const area = getMatch(matches, 3)
  const division = getMatch(matches, 4)
  const buildingAndRoom = getMatch(matches, 5)

  return {
    prefecture,
    municipality,
    area,
    division,
    buildingAndRoom,
  }
}

const input = process.argv.slice(2).join(' ')

console.log(input, JSON.stringify(parseJpAddress(input)))