public function getDeliveryAddressFromCheckoutSession($checkoutSession) {
        $opts = $this->module->getActingOpts();
        $sandbox = $opts['sandbox'];
        $address = $checkoutSession['shippingAddress'];
        $pref = $address['stateOrRegion'];
        $deliveryFullname = explode(' ', $address['name']);
        $deliveryName1 = $deliveryFullname[0];
        $deliveryName2 = isset($deliveryFullname[1]) ? join(' ', array_slice($deliveryFullname, 1)) : '';

        // set flag to 1 because address is pulled from Amazon account
        $delivery = [];
        $delivery['delivery_flag'] = 1;
        $delivery['name1'] = $deliveryName1;
        $delivery['name2'] = $deliveryName2;
        $delivery['name3'] = '';
        $delivery['name4'] = '';
        $delivery['country'] = $address['countryCode'];
        $delivery['fax'] = '';
        $delivery['pref'] = $pref;
        $delivery['tel'] = $address['phoneNumber'];
        $delivery['zipcode'] = $address['postalCode'];
        $delivery['address1'] = $sandbox ? $address['city'] . $address['addressLine1'] : $address['addressLine1'];
        $delivery['address2'] = $address['addressLine2'];
        $delivery['address3'] = $address['addressLine3'];
        // make sure Japanese prefecture name is converted to Japanese if it is in English
        if ($delivery['country'] === 'JP') {
            if (array_key_exists($delivery['pref'], Constants::ETOJ_PREF_MAP) === true) {
                $delivery['pref'] = Constants::ETOJ_PREF_MAP[$delivery['pref']];
            }
        } elseif ($delivery['country'] === 'US') {
            $states = get_option('usces_states');
            if (!in_array($delivery['pref'], $states, true)) {
                if (array_key_exists($delivery['pref'], Constants::ISO_US_STATE_CODE_MAP) === true) {
                    $delivery['pref'] = Constants::ISO_US_STATE_CODE_MAP[$delivery['pref']];
                }
            }
        }

        return $delivery;
    }