Organized by Ie-no-Hikari Association, a total of 9,313 paintings from 56 countries took part in the contest and were evaluated, IRNA reported.
Iran submitted 338 paintings to compete at the Japanese festival.
Baran Ehterami (nine-year-old) received the Gold Prize of the Japanese event, while Maysa Vafa (seven-year-old) won the Silver Prize.
Yasna Zarei, Mersana Dashtizadeh, Delsa Heydari, Elena Omid, and Hasti Najafi were the Bronze Prize winners of the event.
Kamran Khalkhali, Avina Aliasghari, Artina Zaer, Atrin Fardaei, Ava Moqaddasian, and Melissa Tahmasbi received an honorable mention.
The 30th anniversary prizes were given to Barira Tasnim Laya from Bangladesh, Divna Jelyazkova Jelezcheva from Bulgaria, Hyun Ji Kim from South Korea, Zi Feng Chong from Malaysia, Valentin Serghei Turcanenco from Moldova, Matej Sajko from Slovakia, Thivein Nethdinu Mawalla Vithanage from Sri Lanka, Ninlada Anowannaphan from Thailand, Daria Gurenko from Ukraine and Maho Yaguchi from Japan.
The Ie-no-Hikari Association works hard to foster the cultures of rural villages by publishing books and a magazine, and implementing various cultural activities.
As part of its diversified activities, the association has held the World Children’s Picture Contest since 1993 to create friendships and mutual understanding between children worldwide.