This is ok in the code
After that, increase the parameters.
    require 'stripe'
    Stripe.api_key = 'sk_test_OOOO'
    Stripe::Account.update(
      "Child account id",
      email: "[email protected]",
      business_type: "individual",
      individual:{address_kana: {city: "00", postal_code: "1234567"}}
    )