diff --git a/lib/ansible/modules/network/fortios/fortios_system_nat64.py b/lib/ansible/modules/network/fortios/fortios_system_nat64.py
new file mode 100644
index 00000000000..8e0299de196
--- /dev/null
+++ b/lib/ansible/modules/network/fortios/fortios_system_nat64.py
@@ -0,0 +1,363 @@
+#!/usr/bin/python
+from __future__ import (absolute_import, division, print_function)
+# Copyright 2019 Fortinet, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+__metaclass__ = type
+
+ANSIBLE_METADATA = {'status': ['preview'],
+                    'supported_by': 'community',
+                    'metadata_version': '1.1'}
+
+DOCUMENTATION = '''
+---
+module: fortios_system_nat64
+short_description: Configure NAT64 in Fortinet's FortiOS and FortiGate.
+description:
+    - This module is able to configure a FortiGate or FortiOS device by allowing the
+      user to set and modify system feature and nat64 category.
+      Examples include all parameters and values need to be adjusted to datasources before usage.
+      Tested with FOS v6.0.5
+version_added: "2.9"
+author:
+    - Miguel Angel Munoz (@mamunozgonzalez)
+    - Nicolas Thomas (@thomnico)
+notes:
+    - Requires fortiosapi library developed by Fortinet
+    - Run as a local_action in your playbook
+requirements:
+    - fortiosapi>=0.9.8
+options:
+    host:
+        description:
+            - FortiOS or FortiGate IP address.
+        type: str
+        required: false
+    username:
+        description:
+            - FortiOS or FortiGate username.
+        type: str
+        required: false
+    password:
+        description:
+            - FortiOS or FortiGate password.
+        type: str
+        default: ""
+    vdom:
+        description:
+            - Virtual domain, among those defined previously. A vdom is a
+              virtual instance of the FortiGate that can be configured and
+              used as a different unit.
+        type: str
+        default: root
+    https:
+        description:
+            - Indicates if the requests towards FortiGate must use HTTPS protocol.
+        type: bool
+        default: true
+    ssl_verify:
+        description:
+            - Ensures FortiGate certificate must be verified by a proper CA.
+        type: bool
+        default: true
+    system_nat64:
+        description:
+            - Configure NAT64.
+        default: null
+        type: dict
+        suboptions:
+            always_synthesize_aaaa_record:
+                description:
+                    - Enable/disable AAAA record synthesis (default = enable).
+                type: str
+                choices:
+                    - enable
+                    - disable
+            generate_ipv6_fragment_header:
+                description:
+                    - Enable/disable IPv6 fragment header generation.
+                type: str
+                choices:
+                    - enable
+                    - disable
+            nat46_force_ipv4_packet_forwarding:
+                description:
+                    - Enable/disable mandatory IPv4 packet forwarding in nat46.
+                type: str
+                choices:
+                    - enable
+                    - disable
+            nat64_prefix:
+                description:
+                    - "NAT64 prefix must be ::/96 (default = 64:ff9b::/96)."
+                type: str
+            secondary_prefix:
+                description:
+                    - Secondary NAT64 prefix.
+                type: list
+                suboptions:
+                    name:
+                        description:
+                            - NAT64 prefix name.
+                        required: true
+                        type: str
+                    nat64_prefix:
+                        description:
+                            - NAT64 prefix.
+                        type: str
+            secondary_prefix_status:
+                description:
+                    - Enable/disable secondary NAT64 prefix.
+                type: str
+                choices:
+                    - enable
+                    - disable
+            status:
+                description:
+                    - Enable/disable NAT64 (default = disable).
+                type: str
+                choices:
+                    - enable
+                    - disable
+'''
+
+EXAMPLES = '''
+- hosts: localhost
+  vars:
+   host: "192.168.122.40"
+   username: "admin"
+   password: ""
+   vdom: "root"
+   ssl_verify: "False"
+  tasks:
+  - name: Configure NAT64.
+    fortios_system_nat64:
+      host:  "{{ host }}"
+      username: "{{ username }}"
+      password: "{{ password }}"
+      vdom:  "{{ vdom }}"
+      https: "False"
+      system_nat64:
+        always_synthesize_aaaa_record: "enable"
+        generate_ipv6_fragment_header: "enable"
+        nat46_force_ipv4_packet_forwarding: "enable"
+        nat64_prefix: "<your_own_value>"
+        secondary_prefix:
+         -
+            name: "default_name_8"
+            nat64_prefix: "<your_own_value>"
+        secondary_prefix_status: "enable"
+        status: "enable"
+'''
+
+RETURN = '''
+build:
+  description: Build number of the fortigate image
+  returned: always
+  type: str
+  sample: '1547'
+http_method:
+  description: Last method used to provision the content into FortiGate
+  returned: always
+  type: str
+  sample: 'PUT'
+http_status:
+  description: Last result given by FortiGate on last operation applied
+  returned: always
+  type: str
+  sample: "200"
+mkey:
+  description: Master key (id) used in the last call to FortiGate
+  returned: success
+  type: str
+  sample: "id"
+name:
+  description: Name of the table used to fulfill the request
+  returned: always
+  type: str
+  sample: "urlfilter"
+path:
+  description: Path of the table used to fulfill the request
+  returned: always
+  type: str
+  sample: "webfilter"
+revision:
+  description: Internal revision number
+  returned: always
+  type: str
+  sample: "17.0.2.10658"
+serial:
+  description: Serial number of the unit
+  returned: always
+  type: str
+  sample: "FGVMEVYYQT3AB5352"
+status:
+  description: Indication of the operation's result
+  returned: always
+  type: str
+  sample: "success"
+vdom:
+  description: Virtual domain used
+  returned: always
+  type: str
+  sample: "root"
+version:
+  description: Version of the FortiGate
+  returned: always
+  type: str
+  sample: "v5.6.3"
+
+'''
+
+from ansible.module_utils.basic import AnsibleModule
+from ansible.module_utils.connection import Connection
+from ansible.module_utils.network.fortios.fortios import FortiOSHandler
+from ansible.module_utils.network.fortimanager.common import FAIL_SOCKET_MSG
+
+
+def login(data, fos):
+    host = data['host']
+    username = data['username']
+    password = data['password']
+    ssl_verify = data['ssl_verify']
+
+    fos.debug('on')
+    if 'https' in data and not data['https']:
+        fos.https('off')
+    else:
+        fos.https('on')
+
+    fos.login(host, username, password, verify=ssl_verify)
+
+
+def filter_system_nat64_data(json):
+    option_list = ['always_synthesize_aaaa_record', 'generate_ipv6_fragment_header', 'nat46_force_ipv4_packet_forwarding',
+                   'nat64_prefix', 'secondary_prefix', 'secondary_prefix_status',
+                   'status']
+    dictionary = {}
+
+    for attribute in option_list:
+        if attribute in json and json[attribute] is not None:
+            dictionary[attribute] = json[attribute]
+
+    return dictionary
+
+
+def underscore_to_hyphen(data):
+    if isinstance(data, list):
+        for elem in data:
+            elem = underscore_to_hyphen(elem)
+    elif isinstance(data, dict):
+        new_data = {}
+        for k, v in data.items():
+            new_data[k.replace('_', '-')] = underscore_to_hyphen(v)
+        data = new_data
+
+    return data
+
+
+def system_nat64(data, fos):
+    vdom = data['vdom']
+    system_nat64_data = data['system_nat64']
+    filtered_data = underscore_to_hyphen(filter_system_nat64_data(system_nat64_data))
+
+    return fos.set('system',
+                   'nat64',
+                   data=filtered_data,
+                   vdom=vdom)
+
+
+def is_successful_status(status):
+    return status['status'] == "success" or \
+        status['http_method'] == "DELETE" and status['http_status'] == 404
+
+
+def fortios_system(data, fos):
+
+    if data['system_nat64']:
+        resp = system_nat64(data, fos)
+
+    return not is_successful_status(resp), \
+        resp['status'] == "success", \
+        resp
+
+
+def main():
+    fields = {
+        "host": {"required": False, "type": "str"},
+        "username": {"required": False, "type": "str"},
+        "password": {"required": False, "type": "str", "no_log": True},
+        "vdom": {"required": False, "type": "str", "default": "root"},
+        "https": {"required": False, "type": "bool", "default": True},
+        "ssl_verify": {"required": False, "type": "bool", "default": True},
+        "system_nat64": {
+            "required": False, "type": "dict", "default": None,
+            "options": {
+                "always_synthesize_aaaa_record": {"required": False, "type": "str",
+                                                  "choices": ["enable", "disable"]},
+                "generate_ipv6_fragment_header": {"required": False, "type": "str",
+                                                  "choices": ["enable", "disable"]},
+                "nat46_force_ipv4_packet_forwarding": {"required": False, "type": "str",
+                                                       "choices": ["enable", "disable"]},
+                "nat64_prefix": {"required": False, "type": "str"},
+                "secondary_prefix": {"required": False, "type": "list",
+                                     "options": {
+                                         "name": {"required": True, "type": "str"},
+                                         "nat64_prefix": {"required": False, "type": "str"}
+                                     }},
+                "secondary_prefix_status": {"required": False, "type": "str",
+                                            "choices": ["enable", "disable"]},
+                "status": {"required": False, "type": "str",
+                           "choices": ["enable", "disable"]}
+
+            }
+        }
+    }
+
+    module = AnsibleModule(argument_spec=fields,
+                           supports_check_mode=False)
+
+    legacy_mode = 'host' in module.params and module.params['host'] is not None and \
+                  'username' in module.params and module.params['username'] is not None and \
+                  'password' in module.params and module.params['password'] is not None
+
+    if not legacy_mode:
+        if module._socket_path:
+            connection = Connection(module._socket_path)
+            fos = FortiOSHandler(connection)
+
+            is_error, has_changed, result = fortios_system(module.params, fos)
+        else:
+            module.fail_json(**FAIL_SOCKET_MSG)
+    else:
+        try:
+            from fortiosapi import FortiOSAPI
+        except ImportError:
+            module.fail_json(msg="fortiosapi module is required")
+
+        fos = FortiOSAPI()
+
+        login(module.params, fos)
+        is_error, has_changed, result = fortios_system(module.params, fos)
+        fos.logout()
+
+    if not is_error:
+        module.exit_json(changed=has_changed, meta=result)
+    else:
+        module.fail_json(msg="Error in repo", meta=result)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/test/units/modules/network/fortios/test_fortios_system_nat64.py b/test/units/modules/network/fortios/test_fortios_system_nat64.py
new file mode 100644
index 00000000000..ac8e2e2dd03
--- /dev/null
+++ b/test/units/modules/network/fortios/test_fortios_system_nat64.py
@@ -0,0 +1,191 @@
+# Copyright 2019 Fortinet, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <https://www.gnu.org/licenses/>.
+
+# Make coding more python3-ish
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import os
+import json
+import pytest
+from mock import ANY
+from ansible.module_utils.network.fortios.fortios import FortiOSHandler
+
+try:
+    from ansible.modules.network.fortios import fortios_system_nat64
+except ImportError:
+    pytest.skip("Could not load required modules for testing", allow_module_level=True)
+
+
+@pytest.fixture(autouse=True)
+def connection_mock(mocker):
+    connection_class_mock = mocker.patch('ansible.modules.network.fortios.fortios_system_nat64.Connection')
+    return connection_class_mock
+
+
+fos_instance = FortiOSHandler(connection_mock)
+
+
+def test_system_nat64_creation(mocker):
+    schema_method_mock = mocker.patch('ansible.module_utils.network.fortios.fortios.FortiOSHandler.schema')
+
+    set_method_result = {'status': 'success', 'http_method': 'POST', 'http_status': 200}
+    set_method_mock = mocker.patch('ansible.module_utils.network.fortios.fortios.FortiOSHandler.set', return_value=set_method_result)
+
+    input_data = {
+        'username': 'admin',
+        'state': 'present',
+        'system_nat64': {
+            'always_synthesize_aaaa_record': 'enable',
+            'generate_ipv6_fragment_header': 'enable',
+            'nat46_force_ipv4_packet_forwarding': 'enable',
+            'nat64_prefix': 'test_value_6',
+            'secondary_prefix_status': 'enable',
+            'status': 'enable'
+        },
+        'vdom': 'root'}
+
+    is_error, changed, response = fortios_system_nat64.fortios_system(input_data, fos_instance)
+
+    expected_data = {
+        'always-synthesize-aaaa-record': 'enable',
+        'generate-ipv6-fragment-header': 'enable',
+        'nat46-force-ipv4-packet-forwarding': 'enable',
+        'nat64-prefix': 'test_value_6',
+        'secondary-prefix-status': 'enable',
+        'status': 'enable'
+    }
+
+    set_method_mock.assert_called_with('system', 'nat64', data=expected_data, vdom='root')
+    schema_method_mock.assert_not_called()
+    assert not is_error
+    assert changed
+    assert response['status'] == 'success'
+    assert response['http_status'] == 200
+
+
+def test_system_nat64_creation_fails(mocker):
+    schema_method_mock = mocker.patch('ansible.module_utils.network.fortios.fortios.FortiOSHandler.schema')
+
+    set_method_result = {'status': 'error', 'http_method': 'POST', 'http_status': 500}
+    set_method_mock = mocker.patch('ansible.module_utils.network.fortios.fortios.FortiOSHandler.set', return_value=set_method_result)
+
+    input_data = {
+        'username': 'admin',
+        'state': 'present',
+        'system_nat64': {
+            'always_synthesize_aaaa_record': 'enable',
+            'generate_ipv6_fragment_header': 'enable',
+            'nat46_force_ipv4_packet_forwarding': 'enable',
+            'nat64_prefix': 'test_value_6',
+            'secondary_prefix_status': 'enable',
+            'status': 'enable'
+        },
+        'vdom': 'root'}
+
+    is_error, changed, response = fortios_system_nat64.fortios_system(input_data, fos_instance)
+
+    expected_data = {
+        'always-synthesize-aaaa-record': 'enable',
+        'generate-ipv6-fragment-header': 'enable',
+        'nat46-force-ipv4-packet-forwarding': 'enable',
+        'nat64-prefix': 'test_value_6',
+        'secondary-prefix-status': 'enable',
+        'status': 'enable'
+    }
+
+    set_method_mock.assert_called_with('system', 'nat64', data=expected_data, vdom='root')
+    schema_method_mock.assert_not_called()
+    assert is_error
+    assert not changed
+    assert response['status'] == 'error'
+    assert response['http_status'] == 500
+
+
+def test_system_nat64_idempotent(mocker):
+    schema_method_mock = mocker.patch('ansible.module_utils.network.fortios.fortios.FortiOSHandler.schema')
+
+    set_method_result = {'status': 'error', 'http_method': 'DELETE', 'http_status': 404}
+    set_method_mock = mocker.patch('ansible.module_utils.network.fortios.fortios.FortiOSHandler.set', return_value=set_method_result)
+
+    input_data = {
+        'username': 'admin',
+        'state': 'present',
+        'system_nat64': {
+            'always_synthesize_aaaa_record': 'enable',
+            'generate_ipv6_fragment_header': 'enable',
+            'nat46_force_ipv4_packet_forwarding': 'enable',
+            'nat64_prefix': 'test_value_6',
+            'secondary_prefix_status': 'enable',
+            'status': 'enable'
+        },
+        'vdom': 'root'}
+
+    is_error, changed, response = fortios_system_nat64.fortios_system(input_data, fos_instance)
+
+    expected_data = {
+        'always-synthesize-aaaa-record': 'enable',
+        'generate-ipv6-fragment-header': 'enable',
+        'nat46-force-ipv4-packet-forwarding': 'enable',
+        'nat64-prefix': 'test_value_6',
+        'secondary-prefix-status': 'enable',
+        'status': 'enable'
+    }
+
+    set_method_mock.assert_called_with('system', 'nat64', data=expected_data, vdom='root')
+    schema_method_mock.assert_not_called()
+    assert not is_error
+    assert not changed
+    assert response['status'] == 'error'
+    assert response['http_status'] == 404
+
+
+def test_system_nat64_filter_foreign_attributes(mocker):
+    schema_method_mock = mocker.patch('ansible.module_utils.network.fortios.fortios.FortiOSHandler.schema')
+
+    set_method_result = {'status': 'success', 'http_method': 'POST', 'http_status': 200}
+    set_method_mock = mocker.patch('ansible.module_utils.network.fortios.fortios.FortiOSHandler.set', return_value=set_method_result)
+
+    input_data = {
+        'username': 'admin',
+        'state': 'present',
+        'system_nat64': {
+            'random_attribute_not_valid': 'tag',
+            'always_synthesize_aaaa_record': 'enable',
+            'generate_ipv6_fragment_header': 'enable',
+            'nat46_force_ipv4_packet_forwarding': 'enable',
+            'nat64_prefix': 'test_value_6',
+            'secondary_prefix_status': 'enable',
+            'status': 'enable'
+        },
+        'vdom': 'root'}
+
+    is_error, changed, response = fortios_system_nat64.fortios_system(input_data, fos_instance)
+
+    expected_data = {
+        'always-synthesize-aaaa-record': 'enable',
+        'generate-ipv6-fragment-header': 'enable',
+        'nat46-force-ipv4-packet-forwarding': 'enable',
+        'nat64-prefix': 'test_value_6',
+        'secondary-prefix-status': 'enable',
+        'status': 'enable'
+    }
+
+    set_method_mock.assert_called_with('system', 'nat64', data=expected_data, vdom='root')
+    schema_method_mock.assert_not_called()
+    assert not is_error
+    assert changed
+    assert response['status'] == 'success'
+    assert response['http_status'] == 200