This caricature’s motif come from an exhibition of “Abe Mario” which was shown at the closing ceremony of Rio Olympics 2016. The motif of “Abe Mario” come from a family computer’s very famous game:”Super Mario Bros”, which was originally released in 1985 in Japan.
*”Super Mario Bros” on Wikipedia
In this game, the turtles are the enemy of Mario, therefore the turtles are trying to attack “Abe Mario” in this caricature. Because this “Abe” means Japan Prime Minister Shinzo Abe.
The script in this caricature says:”The polluted water has mutated these turtles! This isn’t a part of the ceremony, people!”. This “polluted water” is “polluted water which is contaminated by high level radiation from Fukushima(Tokyo Electric Power Company, abbreviation is TEPCO) Nuclear Plant Disasters”, and “mutated these turtles” means “some animals(including human begins and plants) have the possibility to mutate caused by radioactive exposure”. This caricature is not a joke, it says one kind of the truth. I also have seen several malformated flowers and vegetables after Fukushima(TEPCO) Nuclear Plants Disasters in March 2011. I’ve never seen such a many malformated flowers, plants and vegetables in my past 40 years life…NEVER seen even once in before…only after March 11th 2011….
Therefore, when if you will see this kind of caricature, I strongly recommend you to not laugh with this. I strongly recommend you to consider this kind of thing seriously, in order to get your appropriate literacy to avoid such a serious troubles which will come to you.