
The ministry's Deputy Director General of Consular Affairs Madurapochana Ittarong granted him a 90-day travel document for alien, allowing him to make a single round trip between Thailand and Japan.
The ministry handed him the document after the Interior Ministry's Permanent Secretary Wichai Srikwan made the request on Friday.
The 12-year-old Mong was born to a couple of Burmese migrant workers in northern Chiang Mai province. He received Thai education from primary school in the province but did not obtain Thai citizenship due to his alien parents.
His origami plane could fly for 12.5 minutes in the air, top of the Thai local contest. Japan Origami Plane invited him to join the contest in Japan but the interior ministry reportedly objected his traveling for security reason.
Mong is the third non-Thai national who carried Thai travel document to abroad and has the right to return into the kingdom.
He obtained document after many attempts including asking Prime Minister Abhisit Vejjajiva to relax the regulations for him to go.